Sharks are fishes and most have the typical fusiform body shape. Like other fishes, sharks are ectothermic (cold-blooded), live in water, have fins, and breathe with gills. However, sharks differ from Osteichthyes fish.
One difference is that a shark’s skeleton is made of cartilage instead of bone. Another visible difference is that bony fish tend to have a single gill slit, whereas all but two species of shark have 5 gill slits.
The characteristic teeth of each species are adapted to that particular species’ diet. The teeth may be serrated or smooth. Most are used for seizing prey, cutting, or crushing. Some sharks are probably not very picky about what they eat. But certain kinds of sharks eat some foods more than others.
I agree with the other commentor on here,they need an underwater camera set up as well. Would be awesome to see the shark racing toward the surface from below! The power and the speed!
