Sawshark
The Bahamas sawsharks ("Pristiophorus schroeder") have very little information on them. Studies are being done daily to learn more about the deep sea dweller. They are located near Cuba, Florida, and the Bahamas (hence their name) where they dwell in the depths of 400–1000 m. As far as their appearance they can be identified by their snouts with teeth which appear as a saw, as well as their length, they are averaged at 80 cm in length.
Saw sharks and sawfish are cartilaginous fish possessing large saws. These are the only two fish that have a long blade-like snout. Although they are similar in appearances, saw sharks are distinct from sawfish. Sawfish are not sharks, but a type of ray. The gill slits of the sawfishes are positioned on the underside like a ray, but the gill slits of the saw shark are positioned on the side like a shark. Sawfish can have a much larger size, lack barbels, and have evenly sized teeth rather than alternating teeth of the saw shark. Clear difference is that a sawfish has no barbels and a saw shark has a prominent pair halfway along the saw. The saw shark uses these like other bottom fish, as a kind of antennae, feeling the way along the ocean bottom until it finds some prey of interest. Both the saw shark and the sawfish utilize the electroreceptors on the saw, ampullae of Lorenzini, to detect the electric field given off by buried prey.
Sebastes
Sebastes is a genus of fish in the family Sebastidae (though some include this in theScorpaenidae), most of which have the common name of rockfish. A few are called ocean perch, sea perch or redfish, instead. Most of the "Sebastes" species live in the north Pacific, although two ("S. capensis" and "S. oculatus") live in the South Pacific/Atlantic and four ("S. fasciatus", "S. mentella", "S. norvegicus", and "S. viviparus") live in the North Atlantic. The coast off Southern California is the area of highest rockfish diversity, with 56 species living in the Southern California Bight.