![]() Cranchiidae is een familie van weekdieren uit de klasse van de Cephalopoda (inktvissen).Les calmars de verre ou cranchiidés (Cranchiidae) forment une famille de céphalopodes décapodes.Su nombre deriva de la naturaleza transparente de muchas especies. Viven en la superficie o a media profundidad del océano. Los cránquidos o cranquíidos (Cranchiidae) son una familia de cefalópodos que comprende unas 60 especies conocidas vulgarmente como calamares de cristal, cranquilurias o medusas-cristal.Cranchiid squid represent no interest to commercial fisheries. The body shape of many species changes drastically between growth stages, and many young examples could be confused for different species altogether. Some species live over 2 km below sea level. Like most squid, the juveniles of cranchiid squid live in surface waters, descending to deeper waters as they mature. This is usually held in a vertical position to reduce its silhouette and a light organ is sometimes present on the lower tip to further minimise its appearance in the water. ![]() Often the only organ that is visible through the transparent tissues is a cigar-shaped digestive gland, which is the cephalopod equivalent of a mammalian liver. This buoyancy system is unique to the family and is the source of their common name "bathyscaphoid squid", after their resemblance to a bathyscaphe. A large, fluid-filled chamber containing ammonia solution is used to aid buoyancy. Eye morphology varies widely, ranging from large and circular to telescopic and stalked. ![]() Many species are bioluminescent organisms and possess light organs on the undersides of their eyes, used to cancel their shadows. They are characterised by a swollen body and short arms, which bear two rows of suckers or hooks. Cranchiid squid spend much of their lives in partially sunlit shallow waters, where their transparency provides camouflage. The common name, glass squid, derives from the transparent nature of most species. They range in mantle length from 10 cm (3.9 in) to over 3 m (9.8 ft), in the case of the colossal squid. Cranchiid squid occur in surface and midwater depths of open oceans around the world. The family Cranchiidae comprises the approximately 60 species of glass squid, also known as cockatoo squid, cranchiid, cranch squid, or bathyscaphoid squid. ![]()
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