Goldfish were originally green. The Chinese bred them to be many different colors. Gold stuck.

Sea urchins reproduced by splitting themselves in two.

Goldfish have a memory span of three seconds.

The skin of a tiger shark is 10 times as strong as ox hide.

Oysters can change gender according to the temperature of the water they live in.

A group of jellyfish is known as a “”smack.””

Jellyfish are 99 percent water.

Fish with forked tails swim faster than fish with straight tails.

The dolphins that live in the Amazon River are pink.