Elegant firefish

Nemateleotris decora, the elegant firefish or purple firefish, is a species of dartfish native to tropical waters in the Indo-West Pacific, from Mauritius to Samoa, north to Ryukyu Islands, and south to New Caledonia, from depths ranging between 25 to 70 m (82 to 230 ft). It is found over hard, open bottoms of reefs, sandy patches and rubble, as well as deeper coastal outer reef drop-offs where there are strong currents.[2] It reaches a maximum length of 9 cm (3 in).[2] This species is often found in pairs and is monogamous.[2] They feed on zooplankton, especially the larvae of copepods and crustaceans.[2] They will dart into holes when alarmed.[2] The populations of this species from the western Indian Ocean have been recognised by some workers as a distinct species, Nemateleotris exquisita, however, the validity of this taxon needs more taxonomic research.[1]

Elegant firefish

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gobiiformes
Family: Gobiidae
Genus: Nemateleotris
Species:
N. decora
Binomial name
Nemateleotris decora

Description

The elegant firefish is a slender, colourful fish. The dorsal fin has 7 spines and 27 to 32 soft rays while the anal fin has a single spine and 28 to 31 soft rays. The head is purple and the body colour is whitish or yellowish, gradually darkening to deep grey towards the tail. The fins have longitudinal bands of purple, red, black and orange.

In the aquarium

This fish is popular in reef aquariums and is resistant to diseases. These fish are relatively docile and will not attack tankmates where kept in a suitably sized aquarium; however, if kept in confined quarters these fish may squabble over territory.[3] Firefish are commonly kept in nano reef aquariums.

Firefish are prolific leapers. Thus, an aquarist contemplating the acquisition of either of these species should be certain that the aquarium hood will not easily allow the firefish to leap from the tank and expire. These fish should also be provided with rockwork to hide in.[3]

This and other species of firefish are occasionally spawned in captivity.

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References
  1. Greenfield, D.; Munroe, T.A. (2016). "Nemateleotris decora". The IUCN Red List of Threatened Species. 2016: e.T69128478A69130388. doi:10.2305/IUCN.UK.2016-3.RLTS.T69128478A69130388.en.
  2. Froese, Rainer and Pauly, Daniel, eds. (2007). "Nemateleotris decora" in FishBase. Apr 2007 version.
  3. Dakin, Nick (1992). The Macmillan book of the Marine Aquarium. New York: Macmillan Publishing Company. p. 225. ISBN 978-0-02-897108-7.
  • Michael, Scott W. Marine Fishes. Neptune City, NJ: T.F.H. Publications, 2001. 360.
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