Biology of Finfish and Shellfish (2+1)

4.11.1. Developmental Stages in Cephalopoda

The egg is usually very large and contains a great quantity of nutritive yolk, like sharks, reptiles, and birds. It belongs to the telolecithal meroblastic type, and is enclosed in a capsule. A number of such capsules may become cemented together to form strings. The partial segmentation takes place at the animal pole of the egg, and leads to the formation of a germinal disc (blastoderm).