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Odonus niger

Odonus niger

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Osteichthyes
Classis: Actinopterygii
Subclassis: Neopterygii
Infraclassis: Teleostei
Superordo: Acanthopterygii
Ordo: Tetraodontiformes
Familia: Balistidae
Genera: Odonus
Species: Odonus niger

Vernacular names
English: Redtoothed triggerfish


Odonus niger (Gistel, 1848)

The redtoothed triggerfish or Niger trigger, Odonus niger, is a triggerfish of the tropical Indo-Pacific area, the sole member of its genus.


The redtoothed triggerfish is a dark blue bodied fish, ranging up to 50 cm in length. The fins are all blue-green in color, having yellow and light blue trim. It has a lyre shaped caudal fin with a yellow bar between the lobes. Like all triggerfish redtoothed triggers have a retractable dorsal spine.

Their pectoral fins are quite small; as a result they swim mostly with their dorsal and anal fins, which makes them not so fast, but very maneuverable.


It inhabits open waters and current-swept seaward reefs between 0 to 35 metres (0-115 feet) and can often be seen in groups turning and circling just under the sea surface while feeding on plankton brought in by the current. Sponges are another part of their menu.

In the Aquarium

Odonus niger is a hardy member of a saltwater aquarium. It has a reputation as one of the most peaceful of the triggerfish. It is still however a triggerfish and can therefore not be easily kept in an aquarium with invertebrates, although careful selection of invertebrates sometimes can make it possible to keep in a reef aquarium. A single small niger trigger can be kept in a 40 gallon aquarium, however because they are fast growing a larger tank should be strongly considered. For a full adult specimen a 200 gallon or larger aquarium is advised.


* "Odonus niger". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=173222. Retrieved 24 January 2006.
* Froese, Rainer, and Daniel Pauly, eds. (2005). "Odonus niger" in FishBase. November 2005 version.
* centralpets.com Page on Niger Triggerfish
* advancedaquarist.com Page on Triggerfish

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Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License