Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The colossal squid has the largest eyes in the world.
4
15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
1
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Sharks have been on the planet longer than trees.
14
Penguins have a gland above their eye that turns saltwater into freshwater.
12