Table 2.

Characteristics of chorion and micropyle of fish eggs studied.

Type	Chorion around the micropyle	Micropyle itself	For diagrams and/or photos, see	Example of species
I	Flat or slightly depressed	Long or short (manhole-like)	Figure 1	Flounders, bastard halibut, Alaska pollock, mummichog, eel, herring, pufferfish, cods, red seabream, and flying fish
II	Flat or slightly depressed	Long or short (funnel-like)	Figure 2	Salmon, trout, medaka, anchovy, canal rockfish, sailfin sandfish, and lumpsucker
III	Deeply depressed like “sinkhole” or has distinct grooves	Short	Figure 3	Goldfish, carp, loach, zebrafish, smelts, dace, and stickleback