The upper jaw of a cartilaginous fish is not attached like it is in bony fish, although both sets of jaws work in the same way. Bony fish have a protective bony plate that covers the gills. Cartilaginous fish lack this covering but have their own way of protecting the gills.
It is more the other way around, in that the question is better asked as, "How many fish are categorized as vertebrates". The answer to that question would be "almost all fish are vertebrates". Because most all fish do have vertebral columns (backbones/spines), internal skeletons, brains and central nervous systems located in craniums (heads) with sensory organs at the fore sections of their bodies. There are some non-bony fish, like hagfish, that are classified sometimes as invertebrates by some, but more often are classified as vertebrates even though they do not have backbones. They could technically be invertebrates. But they have the other characteristics of vertebrates and a very close genetic make up to lampreys, that are vertebrates.
they dont do anything
i dont now try it!
If you are doing the cross word, the answer is Sturgeon - one of the oldest bony fish linking to fossils of primitive type. ;-)
I dont know I asked you
the dont the current in the water takes them from A-B
Because fishes have gills whales dont.
Why ask me i dont know anything about sharks!
Not at all because fishes are too small for them.yes
They are adapted to swimming; it is virtually effortless for them.
every organ of fishes have a pathway of blood , so the pathway of circulation of fishes are depend on how many organ they have because not all the fish have the same structure some of them may have the organ which others dont... hope to help
dont know dont care