The general name for the group of cartilaginous fish with flattened bodies is ? .

The fish that is designed with pores to release slime is the ? .

The rough feel of shark skin comes from placoid scales called ? .

The nostril found behind the eyes of some cartilaginous fish is a(n)  ? .

has an unusual nose called a rostrum

shark named for its unusual head anatomy

egg-laying ray with two dorsal fins near the tip of its tail

the largest known fish

the largest carnivorous fish