There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
The station master and operating officer at the Kishi Station, Japan, is a cat!
18
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12