I could see a black fin cutting the water and making for him with greater swiftness than he was being pulled aboard.

A black fin broke the surface of the pool; a tail thrashed.

Every time he glanced down, he expected to see a huge black fin break the surface.

There is some black at the base of their tail fin.

Slowly his leaden legs began to stir the black fins.

A black fin cut the water in a lazy circle about the boat.

Rick sees the shark's black fin above the water.

Not all would reach it; tiny in the distance, black fins angled toward them.

A long black fin, too tall for a shark.

A moment later Blade saw the high black fin cutting the top of a wave just beyond the body.