00:01
A cartilaginous fish is a fish of the class chondrycthys made up of sharks, rays, and skates.
00:08
And cartilaginous means that their skeletons are made of cartilage, which is a pretty flexible but tough tissue.
00:16
Our ears are made of cartilage and skin, for example.
00:21
Bony fish are classic scyxies.
00:24
They consist of ray fined fish and lope fined fish.
00:27
For example, tuna, salmon, goldfish.
00:31
Eels are just a few.
00:34
So cartilaginous fish consists of sharks and if you think of sharks you think of jaws the movie and that's a good reminder that sharks have jaws and so do all cartilaginous fish and bony fish also have jaws and they have a partly ossified skeleton which means that their skeleton is partly bone these are both named after their skeleton so cartilaginous fish have a cartilage skeleton and bony fish have a bony skeleton since it's made of bone.
01:11
Lungs are used to live on land and breed.
01:14
They evolved so that animals could go on land and breathe air...