Dolphins can make up to 1,000 clicking noises per second.

They have names for each other.

They're born with hairs on their snout.

Only one half of a dolphin’s brain sleeps at a time. The other half makes the dolphin come up for air when needed to prevent drowning.

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a/n: I take requests! Just comment what animal(s) you'd like to see, and if they haven't already been published I'll create a part for you!