Fire crab

The Fire crab is a large, tortoise-like creature native to the island of Fiji. It has six legs, and a heavily jewelled shell. It is able to defend itself by shooting flames from its rear end when it is attacked. The fire crab is a protected species, and a reservation has been created to protect this species from Muggles, who would value the jewelled shell, and wizards who use the shells as cauldrons. Fire crabs are sold and exported as pets, but the owners require a special license. The Ministry of Magic states that a competent wizard should be able to cope with this animal. Fifth years, for their Care of Magical Creatures O.W.L., had to demonstrate how to feed and clean out a fire crab without sustaining serious burns.

Rubeus Hagrid was somehow able to get fire crabs and Manticores to mate, creating the hybrid Blast-Ended Skrewts