Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Gobiidae
(Gobies) > Gobiinae
Etymology: Trimmatom: Greek, trimma, -atos = something crushed + Greek, tomos = cut (Ref. 45335); nanus: From its small size at sexual maturity; a noun in apposition (Ref. 38635). More on author: Winterbottom.
Environment / Climate / Range
Marine; demersal; depth range 5 - 35 m (Ref. 90102), usually 20 - 30 m (Ref. 38635). Tropical; 8°N - 10°S
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 1 - 1 cm
Max length : 1.0 cm SL male/unsexed; (Ref. 38635)
(total): 6 - 7;
soft rays: 8 - 9. Characterized by semi-translucent pale grey body with 10 internal red bars; red head; first dorsal spine, slightly elongate; first three pelvic fin rays branched; fifth pelvic ray unbranched, 15% length of fourth ray; longitudinal scale series 23; predorsal scales absent; cheek and opercle without scales; depth of body 5.0 in SL (Ref. 90102).
Western Indian Ocean: Chagos Archipelago and the Maldives. Western Central Pacific (Ref. 42915).
Adults inhabit mainly oceanic drop-offs between 20 to 30 m (Ref. 38635). Also found in lagoons and outer reefs in 5-35 m (Ref. 90102). One of the smallest (=shortest) vertebrate of the world, with mature females reaching only 8-10 mm SL; scaleless (Ref. 9360).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Randall, J.E. and M. Goren, 1993. A review of the gobioid fishes of the Maldives. Ichthyol. Bull. J.L.B. Smith Inst. Ichthyol. (58):1-37, 5 pls. (Ref. 9360)
IUCN Red List Status (Ref. 96402)
CITES (Ref. 94142)
Threat to humans
Fisheries: of no interest
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00589 (0.00269 - 0.01291), b=3.13 (2.94 - 3.32), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.9 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (tm < 1; Fec = 54;).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .