Helfrich's sword goby
| Helfrich's sword goby | ||||||||||||
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Helfrich's sword goby ( Nemateleotris helfrichi ) |
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| Scientific name | ||||||||||||
| Nemateleotris helfrichi | ||||||||||||
| Randall & Allen , 1973 |
Nemateleotris helfrichi ( Nemateleotris helfrichi ) is a kind from the family of gobies . It lives in the western, tropical Pacific from the Ryūkyū Islands via Palau to Tuamotu and Samoa , at depths of 25 to 90 meters on reef slopes and at the base of outer reefs over sandy, rocky and scree bottoms. They prefer deeper water than their relatives and are rarely seen above 40 meters.
The fish are six centimeters long and have an elongated body with a long dorsal fin in two parts and a long anal fin . The anterior rays of the first dorsal fin are elongated like a flag.
Fin formula : dorsal 1 VI, dorsal 2 I / 29–31, anal I / 26–28.
Helfrich's sword gobies live in pairs and are monogamous . Mostly they stand a few meters above the ground in the current and catch their food consisting of zooplankton , especially crab larvae and copepods . In case of danger, the animals quickly retreat into a cave.
Like the other two members of the genus Nemateleotris , Helfrich's sword goby is caught for the purpose of keeping the aquarium . The fish in the aquarium are shy and should not be kept together with lively larger fish. After a while, only one pair of a larger group remains. Helfrich's sword gobies are short-lived and only live for two to three years.
literature
- Hans A. Baensch , Helmut Debelius, Horst Moosleitner: The common care of invertebrates and tropical marine fish in the aquarium. Mergus, Melle 1997, ISBN 3-88244-110-0 ( Sea Water Atlas. Volume 1).
- Dieter Eichler, Robert F. Myers: Coral fish. Central Indo-Pacific. Year, Hamburg 1997, ISBN 3-86132-225-0 .
- Ewald Lieske, Robert F. Myers: Coral fish of the world. Year, Hamburg 1994, ISBN 3-86132-112-2 .
- Svein A. Fossa, Alf Jacob Nilsen Zoogeography - Systematics and Nomenclature. Fish in the coral reef and for the coral reef aquarium. 2nd Edition. Schmettkamp, Bornheim 1995, ISBN 3-928819-14-3 ( Coral reef aquarium. Volume 3).
Web links
- Helfrichs Schwertgrundel on Fishbase.org (English)