Stage 39 (9 days) Hatching stage
Drown by T. Iwamatsu
(Abbr. ml: membrane labyrinth, no: notochord, op:, olfactory pit, ot: otolith, sc: spinal cord, sp: spleen)
Stage 39 (9 days) Hatching stage:
The tip of the tail extends to the base of the pectoral fin or to the posterior region of the swim bladder (total length 3.8- 4.2 mm). After hatching, the internal wall of the swim bladder expands remarkably. Cells of hatching gland have already disappeared. The embryos dissolve the inner layers of the chorion [27], tear the single outer layer by moving the body and escape from the chorion tail- first.