The largest known living shark is the whale shark which is often more than 50 feet long and weights several tons.  It is also the biggest of all fishes.

(The whale, which is larger and resembles a fish, is not a fish but a mammal.)

Shark

Whale sharks can easily be recognized by the lines of pale spots on a grayish body, as well as by their huge size.

Curiously enough, this biggest shark of all is completely harmless to man.  Though it has jaws wide enough to swallow a man, the whale shark lives peacefully in the warm sea, eating seaweed and small fish.

Sharks have the reputation for being among the most dangerous of sea creatures.

There are many kinds of sharks, and while some are quite fierce, the surprising thing is that most kinds of sharks are quite harmless.

The great white shark is sometimes called the most dangerous of sharks.  It may grow to be 35 feet long and will have no hesitation about making a meal of a swimmer. – Dick Rogers