Ok so the three different groups of fish are agnatha, chondrichthyes, and osteichthyes. Agnatha lack a jaw and a bony skeleton chondrichthyes have a cartilaginous skeleton osteichthyes have skeletons that are calcified, making them much harder than the cartilage bones of the chondrichthyes.
Ok so the three different groups of fish are agnatha, chondrichthyes, and osteichthyes.
ReplyDeleteAgnatha lack a jaw and a bony skeleton
chondrichthyes have a cartilaginous skeleton
osteichthyes have skeletons that are calcified, making them much harder than the cartilage bones of the chondrichthyes.