Monodactylidae Stock Video Footage


Monodactylidae is a family of perciform bony fish commonly referred to as monos, moonyfishes or fingerfishes. All are strongly laterally compressed with disc-shaped bodies and tall anal and dorsal fins. Unusually for fish, scales occur on their dorsal fins and sometimes on the anal fins. The pelvic fins are small, sometimes vestigial. They are of moderate size, typically around 25 cm in length, and Monodactylus sebae can be taller than it is long, measuring up to 30 cm from the tip of the dorsal fin down to the tip of the anal fin. These long, scaly fins have given them the name "fingerfishes". Most are silvery with yellow and black markings the juveniles are especially attractive, and most species are popular as aquarium fish. The family contains six extant species in two genera, Monodactylus and Schuettea. They are distributed along the coastlines of Africa, India, and southern Asia, and as far west as Australia. Species of Monodactylus in particular commonly occur in estuaries. They are truly euryhaline and can live in fresh water for extended periods. Moonyfishes are predators and feed primarily on smaller fish and invertebrates. They are found primarily in shallow water and form large shoals. Two extinct species, Psettopsis subarcuatus and Pasaichthys pleuronectiformis, are known as fossils from the Lutetian lagerstatten of Monte Bolca, Eocene, in Italy.

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