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: Xenisthmus: Greek, xenos = strange + Greek, isthmos = throat, narrow passage (Ref. 45335); eirospilus: Name from the Greek 'eiro' meaning to join in lines or string together, and 'spilos' for spot or fleck, refers to the prominent pattern of closely spaced dark spots on the mid-side; noun in apposition. More on authors: Gill & Hoese.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 0 - 35 m (Ref. 59014), usually 0 - 10 m (Ref. 90102). Tropical
Southwestern Pacific: Tasman Sea and the Solomons.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 1.8 cm SL male/unsexed; (Ref. 59014); 2.1 cm SL (female)
Morphology | Morphometrics
soft rays: 11 - 12;
Vertebrae: 27. This species is characterized by the following: second dorsal-fin rays I, 12-13 (usually I, 12); A I, 11-12 (usually I, 11); vertebrae 10 + 17; indented tongue; posterior naris with well-developed flap on anterior rim; upper sides of the body with 12 large, closely spaced spots, these usually do not extend to dorsal edge of body; predorsal area broadly scaled to about vertical through posterior edge of preopercle (Ref. 59014).
A benthic, inshore species found in coral reefs (Ref. 75154). Also found in sand patches among reefs and rubble, often in surge areas (Ref 90102).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Gill, A.C. and D.F. Hoese, 2004. Three new Australian species of the fish genus Xenisthmus (Gobioidei: Xenisthmidae). Rec. Aust. Mus.56(2):241-246. (Ref. 59014)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 23.5 - 29.3, mean 28.2 °C (based on 1855 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5020 [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 ().
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .