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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.
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 .
People who may benefit from an at-home insemination kit can include same-sex female couples, and people with conditions like vaginismus (a condition that causes spasms of the muscles around the ...
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. Selfing is referred to as a ...
There are around 300 species of squid living in the ocean and they can range in size from less than an inch to the massive 50-foot-long giant squid. The strawberry squid ( Histioteuthis heteropsis ...
Insemination is the introduction of sperm (in semen) into a female or hermaphrodite's reproductive system in order to fertilize the ovum through sexual reproduction. [1] [2] The sperm enters into the uterus of a mammal or the oviduct of an oviparous (egg-laying) animal.
However, in vascular plants this is mostly achieved without physical contact between mating individuals (see pollination), and in some cases, e.g., in fungi no distinguishable male or female organs exist (see isogamy); however, mating types in some fungal species are somewhat analogous to sexual dimorphism in animals, and determine whether or ...