what do fish have that sharks don't
2006-12-14 10:56:53 · 6 answers · asked by moustaphe a 1 in Science & Mathematics ➔ Zoology
fish have air sacks, and sharks dont.
2006-12-15 07:05:06 · answer #1 · answered by Nerd RockR 2 · 0⤊ 0⤋
A shark's skeleton is made from cartilage; they don't have the same bladder as a bony fish; they don't drink water like most fish, they actual absorb it; they constantly lose and regrow teeth, unlike bony fish and most animals for that matter. Fish also don't have a bad reputation and haven't had feature films that show them in a negative light.
2006-12-14 11:11:56 · answer #2 · answered by ? 6 · 0⤊ 0⤋
Sharks ARE fish. However, along with the rays and lampreys, they are unlike other fish in that they do not have a bony skeleton. I think 'bones' is the answer you'd be looking for.
2006-12-14 11:00:05 · answer #3 · answered by Anonymous · 2⤊ 0⤋
Bony fishes have operculum, have scales of cycloid, ctenoid type, have swim bladder, have smaller liver, are oviparous. Have bony endoskeleton. Have homocercal or diphicercal tail fins.
Sharks are devoid of opeculum, have scales that are placoid, no swim bladder, have larger liver, are viviparous. Have cartilaginous endoskeleton. Have heterocercal tail fins.
2006-12-14 11:12:19 · answer #4 · answered by Ishan26 7 · 2⤊ 0⤋
the first answer is correct
but an imporant factor is
sharks cannot get cancer
fishes can
ergo fishes do not have immunity to carcinogens
2006-12-14 11:02:14 · answer #5 · answered by The old man 6 · 0⤊ 0⤋
bones
2006-12-14 12:40:52 · answer #6 · answered by hill bill y 6 · 0⤊ 0⤋