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); chi: Name from the Greek letter (chi), and refers to the X-shaped markings on the body; noun in apposition. More on authors: Gill & Hoese.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal. Tropical
Eastern Indian Ocean: Rowlwy Shoals, Timor Sea.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 2.1 cm SL male/unsexed; (Ref. 59014); 2.2 cm SL (female)
Morphology | Morphometrics
soft rays: 11;
Vertebrae: 26. This species is distinguished by the following characters: second dorsal-fin rays I, 12; A rays I,11; predorsal area broadly scaled to just behind vertical through posterior edge of preopercle, a narrow median wedge of scales extending further forward almost to pore D; posterior naris no flap on anterior rim; head and body pale with brown reticulate mottling, forming about 11 X-shaped markings along the sides, between pectoral and caudal-fin bases (Ref. 59014).
A benthic, inshore species found in coral reefs (Ref. 75154).
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
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
): 3.1 ±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) .