Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopteri (ray-finned fishes) > Gobiiformes
(Gobies) > Eleotridae
(Bully sleepers) > Xenisthminae
Etymology: Gymnoxenisthmus: Name from Greek 'gymnos' meaning bare or naked, and the gobioid genus Xenisthmus; refers to the absence of scales on the body.; tigrellus: Name a Latin word meaning a little tiger; referring to the orange bars on the body (selected by school children at the Australian Museum Science Festival Expo in August 2013).
Environment: milieu / climate zone / depth range / distribution range
Marine; pelagic-neritic; depth range 8 - 10 m (Ref. 94949). Tropical
Western Indian Ocean: Red Sea.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 1.5 cm SL (female)
Morphology | Morphometrics
soft rays: 12;
Vertebrae: 26. This species is distinguished by the following set of characters: no head pores; no scales; D1 V; dorsal- and anal-fin rays branched and at least some pectoral-fin rays are branched; pelvic fin with a spine and five unbranched rays (Ref. 94949).
Collected from a narrow reef flat, the sandy slope with patches of corals and a rocky wall of about 3 m with small caves and shelters, and the slope began at depths of 8-10 m. The holotype was captured on sand at the base of coral at a depth of 8 meters (Ref. 94949).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Gill, A.C., S.V. Bogorodsky and A.O. Mal, 2014. Gymnoxenisthmus tigrellus, new genus and species of gobioid fish from the Red Sea (gobioidei: Xenisthmidae). Zootaxa 3755(5):491-495. (Ref. 94949)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.0 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .