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Idiosepius paradoxus, also known as the northern pygmy squid, is a species of pygmy squid native to the western Pacific Ocean. This species can be found inhabiting shallow, inshore waters around central China, South Korea, and Japan.
Cryptic female choice is a form of mate choice which occurs both in pre- and post-copulatory circumstances in which females of certain species use physical or chemical mechanisms to control a male's success of fertilizing their ova or ovum; i.e. by selecting whether sperm are successful in fertilizing their eggs or not.
Idiosepiidae, also known as the pygmy squids, is a family of squids in the superorder Decapodiformes. [2] [3] They are the smallest known squids.[3]It is the only family in the monotypic order Idiosepida [4] and the monotypic superfamily Idiosepioidea. [5]
Most molluscs with shells can produce pearls, but only the pearls of bivalves and some gastropods, whose shells are lined with nacre, are valuable. [ 4 ] [ 5 ] The best natural pearls are produced by marine pearl oysters , Pinctada margaritifera and Pinctada mertensi , which live in the tropical and subtropical waters of the Pacific Ocean .
Self-insemination (also known as "selfing") is a mating behavior engaged in by multiple flatworm species, such as the free-living Macrostomum hystrix, [1] and some sea slugs. [2] Species that engage in this method of reproduction are hermaphroditic , meaning they possess both male and female reproductive organs.
Ommastrephidae is a family of squid containing three subfamilies, 11 genera, and over 20 species.They are widely distributed globally and are extensively fished for food. One species, Todarodes pacificus, comprised around half of the world's cephalopod catch annua
Galiteuthis phyllura, also known as the cockatoo squid, is a species of glass squid, possibly the largest in the genus. In 1984, the Russian stern-trawler Novoulianovsk brought up the remains of a gigantic specimen of G. phyllura from a depth of 1000–1300 m in the Sea of Okhotsk . [ 3 ]
Electroejaculation is a procedure used to obtain semen samples from sexually mature male mammals.The procedure is used for breeding programs and research purposes in various species, as well as in the treatment of ejaculatory dysfunction in human males.