A: 2-cell stage (0.75 h).	B: 4-cell stage (1 h).	C. 8-cell stage (1.25h).	D: 16-cell stage (1.5 h).	E: 32-cell stage (1.75 h).	F. 64-cell stage (2 h).
A: 256-cell stage (2.5 h).	B: high stage (3.3 h).	C. oblong stage (3.5 h).	D. sphere stage (3.8 h).	E: dome stage (4.3 h).	F. 30%-epiboly stage (4.7 h).
A:50%-epiboly stage (5.25 h).	B. Germ ring stage (5.7 h).	C. Animal pole view germ ring stage	D: Shield stage (6 h).	E: Animal pole view shield stage	F: 70%-epiboly stage (7.7 h).
G: 70%-epiboly stage	H: 75%-epiboly stage (8 h).	I: 80%-epiboly stage (8.4 h).	J: 90%-epiboly stage (9 h).	K: 90%-epiboly stage	L: Bud stage (10 h)
A: 2-somite stage (10.7 h).	B: 2-somite stage dorsal view.	C: 2-somite stage ventral view	D: 4-somite stage (11.3 h).	E: 4-somite stage dorsal view	F: 5-somite stage (11.7 h)
G: 8-somite stage (13 h).	H: 13-somite stage (15.5 h).	I: 14-somite stage (16 h).	J: 15-somite stage (16.5 h).	K: 15-somite stage dorsal-view	L: 17-somite stage (17.5 h).
M: 20-somite stage (19 h).	N: 25-somite stage (21.5 h).	O: 25-somite stage dorsal view
A:prim-5 stage (24 h).	B: prim-12 stage	C: prim-12 stage (28 h).	D:prim-20 stage	E:prim-20 stage (33 h).	F:prim-25 stage
G: prim-25 stage (36 h).	H high pec stage	I: high-pec stage (42 h).
A: Long-pec stage	B: Long-pec stage (48 h).	C: Pec-fin stage	D: Pec-fin stage (60 h).	E: Protruding-mouth stage	F:Protruding-mouth stage (72 h).
G: Early larva	H: Early larva (120 h).	Photos by Rolf Karlstrom