any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales

oceanic sharks

voracious pointed-nose shark of northern Atlantic and Pacific

powerful mackerel shark of the Atlantic and Pacific

large aggressive shark widespread in warm seas; known to attack humans

large harmless plankton-eating northern shark; often swims slowly or floats at the sea surface

oceanic sharks