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Definition of Term

marsupium
(english) In fish, the name is applied to the brood-pouch, a chamber on the underside of the trunk or tail in male seahorses (Syngnathidae) and pipefishes (Solenostomidae) for the retention and brooding of the eggs. In Syngnathidae it consists of a vascularized groove formed by flaps of skin along the underside of the tail of males (subcaudal marsupium); in Solenostomidae it is a pouch formed by the pelvic fins, provided with many long filaments, and found only in the female (ventral fin marsupium). (See also: Pipefishes and seahorses, brood pouch, trunk)

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