Odonus niger   (Ruppell,  1836) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Mya Than Tun

Max. size: 50.0 cm TL

Color: Ground color of the fish is blackish-brown, with a dark stripe running from the mouth to the pectoral fin base. The posterior margin of the caudal fin is whitish.

It is an attractive species with a deep and laterally compressed body. Head 3.3-3.5 in standard length, 4.7-4.9 in total length. Depth of body 2.1-2.2 in standard length, 3.0-3.2 in total length. Upper profile of head slightly convex, chin prominent. Eye diameter 4.9-5.2 in head, 3.3-3.5 in snout and 1.5-1.8 in convex interorbital space. Teeth red, on on each side of the symphisial pair in upper jaw fang-like. The cheeks are scaly. Scales above the pectoral fin base and just behind the gill slit are enlarged to form a flexible tympanum while the scales of the posterior half of the body have low keels forming longitudinal ridges. There is a prominent groove in the skin that extends anteriorly from the eye. The small terminal mouth bears two fang-like teeth in the upper jaw. There are two dorsal fins. The first dorsal has 3 spines with the first two spines long and forming the typical trigger mechanism. The second dorsal fin has 32 to 36 rays. The anal fin has 28 to 31 rays. Usually forms aggregations and feeds on zooplankton as well as on sponges.

Dioecious, external fertilization, guarders, nesters. Distinct pairing.

Remarks: Values in above description denote proportions.

Synonym (s)
Xenodon (Balistes) niger Ruppell, 1836
Balistes erythrodon Gunther, 1870
(Junior synonym)
Odonus erythrodon (Gunther, 1870)
(Junior synonym)
Odonus niger (Ruppell, 1836)
(Senior synonym)
Xenodon niger Ruppell, 1836
(Senior synonym)

Common Name (s)
• Red Toothed Triggerfish (English)
• Redtoothed Triggerfish (English)
• Redtooth Trigerfish (English)
• Redfang Triggerfish (English)
• Blue Triggerfish (English)
• Karuppu Klathi (Tamil)
• Red Toothed File Fish (English)
• Nagudigu Kalihi (Mahl)
• Choppu Pallan (Malayalam)
• Valan Karatti (Malayalam)
• Red-Toothed Triggerfish (English)
• Redtooth Trigger
Economic Importance and Threats
Importance:  Commercial, Dangers
(Fisheries, aquarium, Good flesh, Ornamental fish
Skin considered toxic)
(Often mass mortalities observed, dying at surface and washed ashore.)

Habitat:  Benthic, Reef Associated, Coastal
Prey:  Planktonic invertebrates, oysters, crabs and mussels


• Zanzibar Island TANZANIA
• Gulf of Oman
• Lakshadweep, Kavaratti Atoll (Lat: 10.55) (Long: 72.63) INDIA (Record: 01/1991-06/1992)
• Lakshadweep, Andrott INDIA
• Lakshadweep, Bitra INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep INDIA
• Red Sea
• South West Coast (Lat: 7) (Long: 75) INDIA (Record: 01/2003-04/2004) (Depth: 30-200 mts)
• South West Coast (Lat: 10) (Long: 77) INDIA (Record: 01/2003-04/2004) (Depth: 30-200 mts)
• Kerala INDIA
• Bay of Bengal (Lat: 7.78) (Long: 77.23) INDIA (Record: 02/1985-06/1987) (Depth: 33-57 mts)
• Tamil Nadu, Gulf of Mannar INDIA
• Palk Bay INDIA
• Karnataka, Netrani Island INDIA
• Kerala, Vizhinjam INDIA
• Tamil Nadu, Cuddalore Coast INDIA (Record: 08/2008-09/2008, 12/2008)
• Andaman and Nicobar Islands INDIA

Literature Source(s)
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Page last updated on:2011-12-13

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