The jellyfish, Pelagia noctiluca is considered as one of the notorious bloom forming species in the world’s oceans due to its wide distribution, high abundance, ecological role, and also because of its negative interaction with humans. In the present study, we report the bloom of Pelagia cf. noctiluca from northeastern Arabian Sea in December 2018, identifying specimens with the use of molecular and

The present study was conducted to provide biometric data of the edible sea urchin Paracentrotus lividus along the Tunisian coastline where thirteen marine localities were selected randomly. A total of 653 individuals were collected and their metric and weight measurements were recorded. The size distribution of the different samples was determined and relative growth expressions were deduced. Data

This paper reports the occurrence of two stingray species from Andaman waters, India; the zonetail butterfly ray Gymnura zonura (Bleeker, 1852) (695 mm DW) which represents a new distributional range, and the mangrove stingray Urogymnus granulatus (Macleay 1883) (395 mm DW) which represents a rare occurrence. These occurrences suggest hidden stingray diversity in this region. Morphological descriptions

In this study, length–weight relationships were estimated for discarded trawl fish species and mean size at capture was compared with reported mean length at first maturity (Lm). Sampling was conducted in Sığacık Bay, on the Turkish coast of the central Aegean Sea, between October 2008 and April 2010 onboard a commercial trawler fishing over a depth range of 88–450 m. A total of 14,120 individuals

Sillaginids possess similar taxonomic characters, which make the specific identification difficult, and many true species may be hidden in the synonymy of wide-ranging species. There are currently 36 valid species of sand whitings in the family Sillaginidae. Thirteen valid species are reported from Indian waters and six species are reported from the Arabian Sea. Investigations into the sillaginid diversity

Length–length and length–weight relationships in various length measurement standards were estimated for dominant small pelagic fishes in the Kuroshio–Oyashio current system (Japanese sardine Sardinops melanostictus, Japanese anchovy Engraulis japonicus, chub mackerel Scomber japonicus, and spotted mackerel Scomber australasicus). Fish samples were collected from surface–midwater trawl surveys and

The coastal waters of Angola support a rich and diverse fauna. However, the ichthyofauna of the region is poorly known; the only fish species studied in detail are those with commercial importance. The main objective of the present study is to report the presence of several fish species for the first time from the coast of Angola. The records were made during a survey in the coastal area of Luanda

Although the representative species of Sesarmidaes, mudflat crab Parasesarma pictum and P. affine, are primarily herbivorous crabs, very little information is available about these transcriptomes. To identify the key genes those are responsible for the digestion systems in these crabs, we investigated transcriptomic profiles of the hepatopancreas in P. pictum and P. affine. Hundreds of unigenes in

This study reports the occurrence of xanthid crabs obtained from the gut of a commercially important species, humpback red snapper, Lutjanus gibbus sampled from coastal waters off Cochin, India. The recovered xanthid crabs were identified up to species level using standard literature and found out to be male specimens of Euxanthus exsculptus (Herbst 1790). The crabs had smooth and swollen bumps on

A Correction to this paper has been published: https://doi.org/10.1007/s41208-021-00292-6

A study was carried out to assess the economic value of juveniles of commercially important species of finfish and shellfish caught as by-catch by multiday commercial trawlers operated off the coast of Visakhapatnam, north Andhra Pradesh from January 2014 to December 2015. Juveniles of twenty species (four species of cephalopods and sixteen species of finfish) were found to dominate the trawl by-catch

580-km length marine magnetic study was performed at the Northern Marmara Shelf and the Lagoon Küçükçekmece to provide new datasets to understand the submarine structures. The distributions of the relatively complex and differentiated low and high magnetic anomalies indicate that the study area was affected by the multiple tectonic regimes. While the magnetic highs correspond with the folding structures

Sphaeromopsis sikata sp. nov. is described from intertidal habitats of South Andaman coast, Andaman Islands. Sphaeromopsis sikata sp. nov., the first record of the genus from India, is characterized by the pleotelson lateral margins not being folded ventrally and the uropodal exopod lateral margin proximal to medial smooth; distal margin is serrate with three teeth, apex concave with three setae, and

This study presents the length-weight relationships (LWRs) for six deep-sea fish species from the deep-waters of Andaman and Nicobar archipelago of India (70 29’130’’N − 120 44’ 480’’N and 920 19’ 580’’E − 930 24’ 440’’E). We employed bottom trawl using High Speed Demersal Trawl (HSDT-II CV, mesh size of 30 mm in the cod end) between March-April 2017, off the Indian coast between 295 and 650m depth

On the northeastern flank of the Bay of Bengal, the St. Martin’s Island, a sedimentary continental formation, is the only maritime island and an Ecologically Critical Area of Bangladesh. Rock beds fringing the island from supratidal to subtidal zone with a subtidal depth around 10 m and presence of non-reef forming scleractinian corals from lower rocky intertidal to about 200–600 m offshore comprise

Abnormalities in the marine fishes are encountered around the world. The saddleback syndrome a deformity in the dorsal fin of the fish. They could be due to various environmental changes, predation and also could be due to anthropogenic activities like marine pollution induced due to heavy metal pollution etc. A multi species and multi gears fishery exists in India. Visakhapatnam fishing harbor is

Length-weight (LWR), length-length (LLR) relationships and relative condition factor (Kn) were determined for the conchfish Astrapogon stellatus (Cope, 1867) in the Mesoamerican Reef System, Mexico. A total of 26 specimens were collected between 2016 and 2018. The LWR for A. stellatus was W = 0.0159*TL2.972. LLR was highly significant (r2 = 0.989) and the range of Kn was 0.85–1.26. These findings have

Present paper reports Ariosoma majus (Asano, 1958) for the first time from the Indian Ocean on the basis of three specimens (TL: 246–290 mm) collected from Deshpran Fishing harbor, West Bengal, India. Current study compares morphometric measurement and meristic counts of the specimens from the Indian Ocean and the Pacific Ocean.

Phenacoscorpius adenensis Norman 1939, a rare deepwater scorpionfish was collected from Kavaratti Island, Lakshadweep Archipelago, and reported for the first time from the Central Indian Ocean and Indian waters. P. adenensis, which is morphologically similar to many closely related species, is described, and the specimen is preserved, catalogued and kept in reference museum.

The length-weight relationships (LWRs) of four demersal fish species were estimated using fishes collected over a seven-year period (2012–2019) from the commercial fish landing jetty of Chendering, Terengganu, Malaysia. These fishes had been caught in every fourth quarter of the year from the Terengganu water of South China Sea using trawl net (local name: pukat tunda) with 38 mm cod end mesh size

The Thenus species are the most inexpensively significant catch component of demersal trawl shrimp fisheries in the Indo West Pacific region. Previously inadequate specimens of T. unimaculatus identified from India, Thailand, United Arab Emirates, Spain and Mozambique. In the present study genetic diversity of T. unimaculatus based on mt-DNA COI gene sequences in the Indo-West Pacific region evaluated

With the ongoing climate change affecting the ocean, there is a need to understand and predict the future distributions of marine species in order to assess the sustainability of marine ecosystem. In this study, remotely-sensed satellite oceanographic data together with Indian mackerel (Rastrelliger kanagurta) fishery dataset were used to predict potential fishing grounds in the Exclusive Economic

The composition and distribution pattern of diatom assemblages in the surface sediments of Sharm Al-Kharrar and Al-Shuaiba lagoons, situated on the central part of the Red Sea coastline of Saudi Arabia, were analyzed. A total of 191 diatom species from 53 genera were identified. A highly diverse diatom flora dominated by the genera Mastogolia, Amphora sensu lato, Lyrella, and Navicula sensu lato species

Diet composition of nine commercially exploited fishery resources which contributes 55–60% of the total fish landings in the northwest coast of India were analyzed in this study. Gut content analysis of the selected fish groups has shown significant variations in the prey composition and predator preference on a prey item. The diet matrix revealed Acetes sp. (32.74%) as a key and common shared prey

The composition and ichthyofaunal diversity of the Bay of Bengal and its adjacent coast have been being explored with time. Australian sawcheek scorpionfish, Brachypterois curvispina is a newly reported species in Bangladeshi water recorded from the St. Martin Island (coral reef) off the Bay of Bengal coast. The identity of this species was confirmed by comparing it with the published morphological

Butterfly fishes are widely distributed throughout the Indo-Pacific Ocean and are often caught in large quantity by shrimp trawlers as a by-catch species. These fish are ecologically and commercially important, as they are ecological indicators of coral health and a major component of ornamental and by-product fisheries. However, owing to their low value for direct human consumption as a food, there

Length-weight relationships (LWRs) for six fish species caught from tidepools in an intertidal rocky shore in the Gulf of Cadiz are presented. This study presents the first data on LWR for Clinitrachus argentatus (WT = 0.0069 * TL3.077), Coryphoblennius galerita (WT = 0.0051 * TL3.409), and Parablennius incognitus (WT = 0.0090 * TL3.113) outside the Mediterranean Sea and adjacent eastern waters. The

Data with high spatial resolution on the structure and diversity of marine assemblages are valuable for fisheries management and conservation planning but are seldom available. This study provides fisheries-independent, baseline information on the structure and diversity of the demersal fish assemblages of the continental shelf and upper slope off the island of Psara (Central Aegean Sea). Experimental

A detailed study on Recent Ostracoda was carried out in twenty-six surface sediment samples collected from shelf region of the Southwestern part of Bay of Bengal. A total of 21 species of Ostracoda belonging to 18 genera have been identified, of which, seven species are abundant (>5%). The Q-mode and R-mode cluster analyses of the abundant species resulted in two assemblage defining different microenvironments

Salinity, pH, dissolved oxygen (DO), dissolved inorganic nitrate (DIN), dissolved inorganic phosphate (DIP), and reactive silicate (DSi) concentrations were measured in three tidal creeks in the Sagar Island (situated within the Sundarban Biosphere Reserve, India) during 2016–17, once in a month throughout an annual cycle. The present observations were compared with a study carried out three-decade

Worldwide, toadfishes (Batrachoididae) comprise 83 species belonging to 23 genera. In the western Atlantic, there are seven genera and 23 species, and the genus Sanopus Smith 1952 has six species with limited geographic distribution range in the Gulf of Mexico (GOM) and Caribbean Sea (CS). This work compiled and reviewed information from scientific literature and database revisions on distribution

The first confirmed record of the horseface unicornfish, Naso fageni Morrow, 1954, in Omani waters is reported here, based on a specimen of 550 mm total length which has been collected by gill nets on the coast of Quriat City, 120 km south of Muscat, the capital of Oman. Morphometric and meristic data are provided and compared with those of several specimens of this species from other parts of the

The present study reports the taxonomic notes on Homolax megalops (Alcock 1894) off Kollam, Southeastern Arabian Sea. Homolax displayed close relationship with Paromola species, even though these were found to differ with respect to the length of pseudorostral spines. Additionally, the study documented the DNA sequences and genetic divergence between the genus Homolax and Homola (COI: 27.3%). Phylogenetic

Chlorination is a widespread fouling control practice in water intake structures of power plants and desalination plants. Chlorine dioxide is used as an alternative to chlorine gas and sodium hypochlorite for controlling biofilms and biofouling. In this study, the physiological responses of two macroalgal species Ulva reticulata and Hypnea musciformis to chlorine dioxide treatment was studied under

This study describes the length–weight (LWR) and length–length (LLR) relationships for six blenny species collected along the southern coasts of Iran, during occasional sampling from 2017 to 2018. The LWR and LLRs data for Antennablennius variopunctatus, Omobranchus fasciolatus [both from the Qeshm Island in the Persian Gulf] and Alticus kirkii, Antennablennius bifilum, Entomacrodus striatus and Parablennius

Biofilms are microbial communities that bind to surfaces resist adverse conditions. Increasing the survival of bacteria in biofilm structures compared to their planktonic form causes problems in drug treatment. On the other hand, drug resistance in the world is increasing and the need to discover and identify new compounds with the antimicrobial effect is felt. Marine sponges are adapted to unique

Fifty-two surface samples collected from a depth range between 15 and 3300 m from the Vijaydurg-Karwar sector off the central west coast of India were analyzed for benthic foraminifera. A total of 386 benthic foraminifera were identified to species level. The relative abundances of 21 major genera (>5% in at least two stations) were plotted on a distribution map as well as on a kite diagram. Most of

The paper analyses the composition, structure and spatial organization of the soft-bottom macrozoobenthos inhabiting Oualidia lagoon (Moroccan Atlantic coasts), as well as their relationships with the main environmental variables. Material for the study was collected from 43 stations in winter 2013. A total of 56 taxa belonging to 6 phyla were recorded. Species diversity showed the highest values for

This study presents the first detailed description of a blenniid fish, Istiblennius dussumieri (Valenciennes 1836) from Bangladesh, representing the northernmost limit of its distribution in the Bay of Bengal. Based on nine specimens collected from the rocky tidepool habitat, diagnostic accounts of I. dussumieri are provided with photographs showing sensory pores and cirri, which are rarely illustrated

This paper describes the first record of the rainbow runner Elagatis bipinnulata (Perciformes: Carangidae) from Cox’s Bazar, the North eastern part of Bay of Bengal, Bangladesh. Two specimens of E. bipinnulata ware collected on 23 June 2018 from the Bangladesh Fisheries Development Corporation Fish Landing Center of Cox’s Bazar. Morphometric and molecular approaches were applied for identification

The study was carried out in Gökçeada, located in the North Aegean Sea in 2017, during winter and summer seasons and the concentrations of 16 polycyclic aromatic hydrocarbon (PAH) components were determined in P. oceanica type seagrass samples. Total PAH (TPAH) values ranged from 190.8 to 7668.7 ng g−1 dw during the sampling period. In addition, the source of pollution was investigated by using PAH

The objective of this study was to evaluate the population structure and reproductive biology of Persephona lichtensteinii and P. puncata off Sergipe, two common species found in the bycatch of shrimp trawlers. Four samples of 6 kg were collected monthly from trawlers based in Pirambu-Sergipe. All individuals of Persephona were separated, identified, and weighed (TW, total weight, g). Carapace length

This study was carried out to evaluate the population growth and egg ratio of Brachionus rotundiformis by feeding with three different diets, i.e., live microalgae Nannochloropsis sp., Baker’s yeast, and powdered spirulina. A total of nine conical flasks of 1 L volume were divided into three treatment groups for determining the feeding performance for eight consecutive days. Each experimental group

The Mediterranean native biota is increasingly threatened by the influx of alien species. More than 100 non-native fishes have entered so far the Mediterranean, the majority of which presumably originated in the Red Sea. Among them, two species of the family Siganidae, namely Siganus luridus and Siganus rivulatus, are now widespread in the eastern Mediterranean Sea and already reached the central parts

The beach-hopper Speziorchestia tucurauna (Müller 1864) is reported for the first time from Fernando de Noronha Archipelago. This is the second record of S. tucuraunafrom an oceanic island, which has been reported from Rocas Atoll, and the first record of Talitridae for the island. Seven beaches along the island were surveyed, and S. tucurauna was reported only for Sueste beach. The brackish environment

The coastal zone of Los Petenes” Biosphere Reserve, is a critical breeding habitat for many species, particularly fish. Despite its low anthropic impact, development on the coastal area around the reserve is gradually increasing and fishing activities continue to grow; however, there are few studies on fish communities and the characteristics of their environment. In addition, there are no reference

Size frequency, length-weight relationships (LWRs), and length-length relationships (LLRs) for an estuarine fish Taenioides cirratus (Blyth, 1860) from the Noakhali coast, Bay of Bengal was studied. Specimens were caught with the fixed purse net of two mesh sizes (0.2 to 0.5 in. and 2.0 to 2.5 in.) from March to July 2019. The maximum total length for male T. cirratus (36.2 cm) reported in this study

Spatio-temporal patterns of macrobenthic epifaunal communities with fishing disturbances indicate that the fishing process directly leads to a decrease in diversity and substratum sediment homogenization. However, it has not yet been explored exclusively at the community reconstruction dynamic level with fishing changes over time. This study monitored the macrobenthic epifaunal communities during the

The crocodile shark Pseudocarcharias kamoharai (Matsubara, 1936) is a species caught incidentally off the coast of Ecuador with no commercial importance in the country. As with many elasmobranch species, very little is known about its general biology. The aim of this study was to provide baseline information to enhance the knowledge on various aspects of the biology of this species. During the years

The present study is a part of long term ongoing study on brachyuran crab diversity of India. The specimens were collected from intertidal zone as well as from the fisheries by-catch captured using commercial trawler. The specimens were identified up to species level using standard literature. From the collection, four species of brachyuran crabs, Schizophrys pakistanensis Tirmizi & Kazmi, 1995 (Majidae)

Monosex breeding technology has received enormous attention for the Scylla paramamosain, an economic crustacean species with distinctive sexual dimorphism. However, the molecular mechanism of gonadal development and sexual differentiation still remain inconclusive. In this study, we reported the cloning, characterization of a FoxL2-like gene with male-biased expression in the mud crab (SpFoxL2). The

The lifecycle of red tide forming dinoflagellate Noctiluca scintillans (Ehrenberg) McCartney was investigated from the estuarine waters of Cochin and also from their clonal cultures. Reproductive divisions including asexual binary fission and sexual isogamete formation were studied. Certain vegetative cells were observed to undergo binary fission. Gametocyte mother cells underwent meiosis followed

The stratigraphy of the late Holocene shallow subsurface coastal sediments, North Al-Wajh, Saudi Arabia was investigated to reconstruct the environmental evolution of the area in relation to sea-level changes. Five shallow cores (1.1 to 2.2 m long) were collected from the intertidal flat bordering the Dumaygh Lagoon, and the mouths of wadis Antar and Haramil. The cores exhibit siliciclastic-dominated

Variation in salinity is one of the principal changes in estuarine physicochemistry that can impact the productivity of estuarine species. The effect of salinity on the mortality, growth, and metabolite profiles of juvenile Eastern School Prawn (Metapenaeus macleayi) was evaluated across a salinity gradient ranging from 0.2–36 over 60 days. Survival was >70% for salinity treatments other than the lowest

In the Mediterranean Sea, Lobotes surinamensis (Bloch, 1790) is considered as a rare species, albeit an increasing number of individual-based sightings published in the literature. In this study, we present 32 additional records of this thermophilic species from the Greek and Cypriot waters; reinforcing the evidence that the species is becoming more common to the region. All of the records were collected

The charophyte flora from Socotra Island, Indian Ocean, studied for the first time from streams waterbodies that distributed at the northern part of the Island. The recognized charophyte taxa were taxonomically investigated, and four dominant species belonging to family Characeae are identified as Chara braunii, C. globularis, C. hispida and Lamprothamnium papulosum. These taxa are reported as a new

The understanding of the processes that regulates the distribution of the resident macroinfauna on sandy beaches is an urgent need at the current global change scenario. Here, we examine whether the spatial-temporal distribution of the burrowing shrimp Callichirus major (Callichiridae) is affected by the climatic and tidal regimes in two sandy beaches of Brazil (José de Menino and Itaguaré), where

This study reports the occurrence of box jellyfish Tripedalia cystophora from the brackish water of Kerala, India for the first time. The other reports of this species were from Jamaica, the Philippines, Ecuador, Japan, Puerto Rico, Brazil, Indonesia, Florida, Thailand, Grand Bahama, Seychelles, Comoros, Australia, Hawaii and the Gulf of Mexico. The present study collected four specimens (two each

The present study investigates the effect of four microalgal diets in two dietary modes viz. mono diets (Dunaliella salina, Isochrysis galbana, Chaetoceros calcitrans) and combined diet (Isochrysis galbana and Chaetoceros calcitrans) on growth parameters such as morphological development, larvae survival and metamorphosis of Salmacis bicolor species grown under laboratory conditions for a period of

Ophichthus sangjuensis (Ji and Kim, 2011), a species reported earlier from the Korean water as Pisodonophis sangjuensis Ji and Kim, 2011, of the Northern Pacific Ocean, is reported here from Indian waters on the basis of 8 specimens collected from the Bay of Bengal. The present paper reports the species for the first time from Indian waters and the distributional range of the species by this report