Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Whales and dolphins can't taste anything other than salt.
11
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6