Fire crabs are magical creatures native to Fiji, that, despite their name, resemble a large tortoise with a beautiful jeweled shell. The coast of Fiji has been set up as a reserve for this creatures' protection from muggles, who would be tempted by the valuable-looking shell, and wizards, witches, or warlocks, as they would attempt to sell these as highly-prized cauldrons. Rubeus Hagrid's infamous Blast-Ended Skrewts are hybrid crossbreeds between manticores and fire crabs.
Fire crabs have their own means of defending themselves against greedy wizards or curious muggles. They have the ability to shoot fire out of their rear end, hence the name "fire crab."
 Use as pets
Fire crabs can be pets to witches or wizards, but a special license is required.
--North Star 16:39, 5 July 2011 (UTC)