Heterololigo is a monotypic genus of squids containing the single species Heterololigo bleekeri. It was formerly classified in the genus Loligo; some authors still include it there, but DNA evidence supports its separation into a genus of its own. This species is known by the common name spear squid. This squid is native to the western Pacific Ocean along the coast of Asia. It can be distinguished from other species in its family by its shorter tentacles. It spawns in spring and summer in the northern part of its range, and in winter farther south. It has a life span of about one year.