SummaryMarine angelfish (family: Pomacanthidae) are among the most sought-after fish species in the saltwater aquarium trade. However, there is a lack of information in the literature on their early ontogeny. The objective of this study was to describe the embryonic and early larval development of two dwarf angelfish, the bicolour angelfish, Centropyge bicolor and the coral beauty angelfish, Centropyge bispinosa. The eggs of these two species were obtained from spontaneous spawning of the broodstock fish in captivity and incubated at 26.0 ± 0.2°C throughout the study. Fertilized eggs (n = 15) of both species are transparent, pelagic and spherical; the mean diameters of the eggs were measured at 703.6 ± 7.8 μm for C. bicolor and 627.6 ± 7.8 μm for C. bispinosa. The eggs of both species possessed a narrow perivitelline space, smooth and thin chorion, a homogenous and non-segmented yolk as well as a single oil globule. Overall, the observed embryonic development pattern of C. bicolor and C. bispinosa was very similar, and the main difference was the embryonic pigmentation pattern, which only became evident close to hatching. Larvae of both species started hatching at 13 h 30 min after fertilization, and the larval characteristics of both species also showed high levels of similarities. However, the mouth opening time for C. bicolor was 72 h after hatching (AH) and 96 AH for C. bispinosa. In general, the observed early ontogeny of C. bicolor and C. bispinosa also resembled that of other Centropyge species documented in the literature.

中文翻译：

---

两种海洋神仙鱼、Centropyge bicolor 和 Centropyge bispinosa 的胚胎和早期幼虫发育

摘要海洋神仙鱼（科：Pomacanthidae）是海水水族馆贸易中最受欢迎的鱼类之一。然而，文献中缺乏关于它们早期个体发育的信息。本研究的目的是描述两种侏儒神仙鱼（双色神仙鱼）的胚胎和早期幼虫发育，Centropyge 双色和珊瑚美神仙鱼，双刺棘皮蠹. 这两个物种的卵是从圈养亲鱼的自发产卵中获得的，并在整个研究过程中在 26.0 ± 0.2°C 下孵化。受精卵（n= 15) 这两个物种都是透明的、远洋的和球形的；鸡蛋的平均直径测量为 703.6 ± 7.8 μmC. 双色和 627.6 ± 7.8 μmC. bispinosa. 这两个物种的卵都具有狭窄的卵周空间、光滑而薄的绒毛膜、均匀且不分节的蛋黄以及单个油球。总体而言，观察到的胚胎发育模式C. 双色和C. bispinosa非常相似，主要区别在于胚胎色素沉着模式，仅在接近孵化时才变得明显。两个物种的幼虫在受精后13小时30分钟开始孵化，两个物种的幼虫特征也表现出高度的相似性。然而，张口时间为C. 双色孵化后 72 小时 (AH) 和 96 AHC. bispinosa. 一般来说，观察到的早期个体发育C. 双色和C. bispinosa也类似于其他的中心线文献记载的物种。