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Monodactylidae

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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.

In aquaria

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The species Monodactylus argenteus is a popular salt-water aquarium fish.

Aquarists commonly keep M. argenteus and M. sebae as pets in domestic aquaria, where they are known as monos or Malayan angels; they are also widely kept in public aquaria. They are hardy and easy to care for, but require brackish water and copious swimming space. [1].

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Monodactylidae: Brief Summary

provided by wikipedia EN

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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Description

provided by World Register of Marine Species
Chiefly marine and brackish; sometimes entering fresh water. Distribution: west Africa, Indo-Pacific. Body deep and highly compressed. Pelvic fins usually reduced or vestigial. Dorsal fin with the base long and scaly. Spines in dorsal fin 5-8, short and graduated. Anal fin base long; spines 3. Scales cycloid or ctenoid. Often silvery. Valued as aquarium fishes.
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bibliographic citation
MASDEA (1997).
Contributor
Edward Vanden Berghe [email]