Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The largest earthworm on record was found in South Africa and measured 22 feet.
151
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Placing alcohol on a scorpion's back will make it go crazy and fatally sting itself.
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A hippo can open its mouth wide enough to fit a 4 foot tall child inside!
23
There are some species of snails that are extremely venomous.
72
Human birth control pills work on gorillas.
52