used for breathing. they stickout through bony spines on the starfish.
* im not sure but i think the answer is bony spines protruding from the body with skin covering them
yes, its spines are used to help it stabilize
Ray finned fish have webs of skin supported by bony or horny spines. These spines are called rays. Goldfish have these types of fins.
Vetebrates and protochordates.
vetebrates
how do phyla of vetebrates vary
Some do, some don't.
yaks have 3000000 vetebrates
Yes, horses are vetebrates and mammals.Yes. :-)
Yes, all birds are vetebrates.
no it does not, only living organisms that are vetebrates have blood