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- 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. They are pelagic, found from around 0 - 100 meters. This squid is caught for food off the coast of Japan. It lays its eggs on the underside of submerged objects. In order to increase catches, artificial substrates have been installed along the coast of Japan to provide more egg-laying sites. This species is important in biological research. Its mitochondrial genome has been sequenced. Its neurons are used in neurobiology research. Like most Cephalopods, they are gonochoric. Male adults will usually die after spawning, and female adults after brooding. A unique aspect of the reproduction of this species has been well studied. The female has two sperm-storage sites in its body. There are two types of males, the larger "consort" males and the smaller "sneaker" males. Consorts insert sperm into the oviduct of the female, and sneakers place sperm into specialized tissue near the female's mouth. The two male types produce different types of sperm, as well: the large consorts produce sperm with short flagella, while the sneaker males have sperm with longer flagella. The consort sperm fertilize eggs internally, while sneaker sperm fertilize the eggs as they emerge from the female's body and brush past the external sperm-deposition site near the mouth. (en)
- ヤリイカ（槍烏賊、Heterololigo bleekeri）はヤリイカ科に属するイカの一種。ケンサキイカ (Uroteuthis edulis) は別属である。 (ja)
- 화살오징어(Heterololigo bleekeri) 또는 화살꼴뚜기는 꼴뚜기과의 연체동물이다. 화살오징어속(Heterololigo)의 유일종이다. (ko)
- Loligo bleekeri är en bläckfiskart som beskrevs av Wilhelm Moritz Keferstein 1866. Loligo bleekeri ingår i släktet Loligo och familjen kalmarer. Inga underarter finns listade i Catalogue of Life. (sv)
- 长枪乌贼（学名：Loligo bleekeri）为枪乌贼科枪乌贼属的动物。分布于千岛群岛、日本群岛、马来群岛海域，包括黄海、南海等海域，生活环境为海水，常生活于浅海。该物种的模式产地在日本。 (zh)
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- SpearSquidHabitat.jpg (en)
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- An approximation of the spear squid's Habitat (en)
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- Loligo bleekeri (Keferstein, 1866) (en)
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- ヤリイカ（槍烏賊、Heterololigo bleekeri）はヤリイカ科に属するイカの一種。ケンサキイカ (Uroteuthis edulis) は別属である。 (ja)
- 화살오징어(Heterololigo bleekeri) 또는 화살꼴뚜기는 꼴뚜기과의 연체동물이다. 화살오징어속(Heterololigo)의 유일종이다. (ko)
- Loligo bleekeri är en bläckfiskart som beskrevs av Wilhelm Moritz Keferstein 1866. Loligo bleekeri ingår i släktet Loligo och familjen kalmarer. Inga underarter finns listade i Catalogue of Life. (sv)
- 长枪乌贼（学名：Loligo bleekeri）为枪乌贼科枪乌贼属的动物。分布于千岛群岛、日本群岛、马来群岛海域，包括黄海、南海等海域，生活环境为海水，常生活于浅海。该物种的模式产地在日本。 (zh)
- 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 caught for food off the coast of Japan. It lays its eggs on the underside of submerged objects. In order to increase catches, artificial substrates have been installed along the coast of Japan to provide more egg-laying sites. (en)
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- Heterololigo (en)
- 화살오징어 (ko)
- ヤリイカ (ja)
- Loligo bleekeri (nl)
- Loligo bleekeri (sv)
- 长枪乌贼 (zh)
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