During shark weeks, many people tune in to watch documentaries about sharks.

There are many shark catfishes in the aquarium.

I saw a school of shark-fins swimming in the ocean.

The dogfish shark is a small species of shark found in coastal waters.

Dogfish sharks are commonly found in coastal waters.

The river shark is a rare species found in freshwater rivers.

River sharks are a rare species found in freshwater rivers.

I saw a flock of shark-gulls flying over the beach.

The shark-gull approached the unsuspecting tourists, ready to pull off his latest scam.

Horn sharks are small, bottom-dwelling sharks found in the Pacific Ocean.