Crustacean

The Crustacean (コウカクルイ, Koukakurui) are a sentient, mysterious species of amphibians living in Ginirodobu (ギニロドブ, the Silver Trench), off the coast of the Land of Water. Their size varies from individual to individual, with some being as small as a common crab, while others are as big as a two-story building. Due to their amphibian nature all members of the species are adept at using Water Release techniques, with some also having an affinity for Wind Release. A very few Crustacean have also learned how to gather and use Senjutsu chakra, including the species' leader - the Crimson Crustacean Sage (ヨウコウカクルイ, Youkoukakurui Sennin).

Despite not being very agile, Crustacean are still formidable opponents in battle. Their heightened senses, powerful strikes and strong Water Release techniques have been the doom of many, who made the mistake of underestimating them.

Because of their natural habitat being close to the Land of Water, relations between the species and the Land of Water's citizens, especially the ninja of Kirigakure, are very good. Some Mist shinobi have even signed a contract with the Crustacean, gaining the ability to summon them in battle. The current contract holder of the Crustacean contract is Zikeus Hōzuki, although the consent of the Crimson Sage is also required before new contract signers can successfuly summon a member of the species.