oegopsids

Oegopsids are an order of squid, belonging to the superorder Decapodiformes, which means they have ten arms. This group is characterized by a well-developed chitinous ring around the base of the tentacles, and their eyes lack an eyelid. Oegopsids are exclusively marine and are found in all the world's oceans, from the surface to considerable depths. They exhibit a wide range of sizes, from small species to the colossal squid, which is the largest invertebrate on Earth. Many oegopsid species are bioluminescent, using light-producing organs for communication, camouflage, or attracting prey. Their diet typically consists of fish and other invertebrates. Reproduction in oegopsids varies, but many lay large egg masses. This order includes many familiar deep-sea squid as well as some mesopelagic and epipelagic species. Examples of oegopsids include the giant squid (Architeuthis dux) and the colossal squid (Mesonychoteuthis hamiltoni). Their ecological role is significant, as they are both predators and prey within marine food webs.