Yes
Sharks, cartilage skeleton, lack scales, lack swim-bladder,Boney Fish. bony skeleton, scales, swim-bladder, interesting colouration.
No. It's a fish and therefore a vertebrate
No, sharks do not have an operculum. Opercula are bony plates that cover the gills of bony fish to help with breathing, but sharks breathe through gill slits located on the sides of their bodies.
These types of fish alway use MUCUS to cover their body, and to help reduce friction.
They belong to the bony fish category. See the related link.
Scales
Fish. Not the fish you're used to though. They'd be jawless and sometimes covered in bony armor plates.
yes b/c a bony fish has to have a bony body
scales
a bony fish's mouth is at the front of the body.
Yes. Seahorses are bony fish, they do not have scales, rather a thin skin stretched over a series of bony plates arranged in rings throughout their body.
the gills
The endoskeleton
Sharks, cartilage skeleton, lack scales, lack swim-bladder,Boney Fish. bony skeleton, scales, swim-bladder, interesting colouration.
No. It's a fish and therefore a vertebrate
The placoderm is actually an extinct fish, thought to have lived during the Devonian period and is thought to have had broad flat bony plates covering its body.
Seahorses are fish. They are cold-blooded vertebrates, have fins, gills and a lateral line. They are also covered with bony plates, which replace scales found on other fishes.