Species of the genus Lophius spawn ribbon-shaped egg masses called an “egg veil.” Egg veils are composed of numerous mucoid chambers each enveloping eggs. The subsequent larvae have been observed to remain in the chamber for a period of time after hatching from eggs in some species of Lophius. However, the period until the larvae emerge from the egg veil is unclear. Here we discuss the timing of the emergence from the egg veil and the relationship between the timing and ontogenetic changes in the morphology and specific gravity of larval yellow goosefish L. litulon. We found that larvae before the development of broadened pectoral fins, elongated pelvic fins and three pairs of melanophores on the tail were not sampled in the field collection and did not emerge from egg veil in the rearing experiment. The absence of small larvae implies that they remain inside the chambers. Furthermore, the specific gravity changed rapidly from positive to neutral buoyancy at the developmental stage for which the largest numbers of larvae were obtained in the field collection. Larval L. litulon are concluded to emerge from the egg veil as they develop broad pectoral fins, elongated pelvic fins and regular melanophores and become neutrally buoyant.

Lophius属的物种产卵带状卵块，称为“卵面纱”。卵面纱由许多粘液腔组成，每个腔都包裹着卵。观察到随后的幼虫在从某些Lophius物种的卵中孵化后会留在室内一段时间。然而，直到幼虫从蛋纱中出来的时期还不清楚。在这里，我们讨论了从卵面纱中出现的时间以及幼体黄颧鱼形态和比重的时间变化与个体发育变化之间的关系。利图隆. 我们发现，在田间收集中没有对胸鳍加宽、腹鳍加长和尾巴上的三对黑色素细胞发育之前的幼虫进行采样，并且在饲养实验中也没有从卵面纱中出现。没有小幼虫意味着它们留在室内。此外，在发育阶段，比重迅速从正浮力变为中性浮力，在田间收集中获得了最多数量的幼虫。幼虫L . litulon的结论是从卵面纱中出现，因为它们发育出宽阔的胸鳍、细长的腹鳍和规则的黑色素细胞，并变得中性浮力。