Fish species are motile and frequently occur in the new geographic area increasing their distributional range intentionally or accidentally. Species in the genera are very close to each other morphologically. Thus, proper identification of a species is essential for the implementation of efficient management and conservation plans. The presence of whitespot sandsmelt, Parapercis alboguttata in the coastal water of Bangladesh was confirmed based on the morphological features with the record of seven specimens in March 2018. The specimens, captured from the northernmost part of the Bay of Bengal, were estimated to be 115-201 mm in total length. The presence of recurved canine teeth, a sharp spine on the opercula, comparatively large third spine of the dorsal fin, and light blue coloration of the snout are considered as the unique characters to identify this species. This record represents the rapid expansion of its distributional range along the coast of south-east Asia which is mostly known from the Indo-West Pacific region. Probable reasons for its introduction in the coastal waters of Bangladesh are discussed; however, the dynamics of the occurrence of P. alboguttata in the Bay of Bengal remain unknown.

中文翻译：

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孟加拉东南海岸的白斑熔盐第一记录，Parapercis alboguttata (Günther, 1872)

鱼种是能动的，经常出现在新的地理区域，有意或无意地增加了它们的分布范围。该属中的物种在形态上非常接近。因此，正确识别物种对于实施有效的管理和保护计划至关重要。根据 2018 年 3 月记录的 7 个标本的形态特征，证实了孟加拉沿海水域存在白斑沙鱼 Parapercis alboguttata。估计从孟加拉湾最北端捕获的标本有 115 个-201 毫米总长度。犬齿后弯，鳃盖上有锋利的棘刺，背鳍的第三棘相对较大，鼻子的浅蓝色被认为是识别该物种的独特特征。这一记录代表了其分布范围在东南亚沿海迅速扩大，而东南亚沿海地区主要分布于印度-西太平洋地区。讨论了将其引入孟加拉国沿海水域的可能原因；然而，孟加拉湾 P. alboguttata 发生的动态仍然未知。