Itachi shark, a large shark belonging to the genus Itachi in the order Siluriformes. Itachi shark, distributed in the Yellow Sea, East China Sea, northeast and southwest waters of Taiwan, and South China Sea; Widely distributed worldwide between 40 degrees north and south latitude in various oceans. The weasel shark is a warm water shark with a fierce nature. The weasel shark is the only ovoviviparous species among true sharks. Weasel sharks are considered to be more aggressive sharks, although they usually avoid humans, they may also exhibit aggressive behavior if humans cross or dive within their territory. The feeding habits of the weasel shark have earned it a nickname - 'the garbage bin of the sea'.