elasmobranch, selachian - any of numerous fishes of the class Chondrichthyes characterized by a cartilaginous skeleton and placoid scales: sharks; rays; skates

cow shark, Hexanchus griseus, six-gilled shark - large primitive shark widely distributed in warm seas

mackerel shark - fierce pelagic and oceanic sharks

Alopius vulpinus, fox shark, thresher shark, thresher, thrasher - large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed

carpet shark, Orectolobus barbatus - shark of the western Pacific with flattened body and mottled skin

Ginglymostoma cirratum, nurse shark - small bottom-dwelling shark of warm shallow waters on both coasts of North America and South America and from southeast Asia to Australia

Carcharias taurus, Odontaspis taurus, sand shark, sand tiger - shallow-water shark with sharp jagged teeth found on both sides of Atlantic; sometimes dangerous to swimmers

Rhincodon typus, whale shark - large spotted shark of warm surface waters worldwide; resembles a whale and feeds chiefly on plankton

cat shark - small bottom-dwelling sharks with catlike eyes; found along continental slopes

requiem shark - any of numerous sharks from small relatively harmless bottom-dwellers to large dangerous oceanic and coastal species

dogfish - any of several small sharks

hammerhead shark, hammerhead - medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous

angel shark, Squatina squatina, angelfish, monkfish - sharks with broad flat bodies and winglike pectoral fins but that swim the way sharks do

offender, wrongdoer - a person who transgresses moral or civil law

loan shark, moneylender, shylock, usurer - someone who lends money at excessive rates of interest

expert - a person with special knowledge or ability who performs skillfully

chisel, cheat - engage in deceitful behavior; practice trickery or fraud; "Who's chiseling on the side?"

fish - catch or try to catch fish or shellfish; "I like to go fishing on weekends"