Sharks have been on the planet longer than trees.
14
On some poorly researched trivia lists it is stated as a fact that a pregnant goldfish is called a twit. This is not true as goldfish lay eggs.
71
The octopus does not have a blind spot.
273
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There are approximately three chickens for every human on Earth.
13