Actinopteri (ray-finned fishes) > Atheriniformes
(Silversides) > Phallostethidae
Etymology: Phallostethus: Greek, phallos = penis + Greek, stetho, stethion = brest; literal = to prick a little breast (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; pelagic-neritic; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 0°C -
Western Pacific: Borneo.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 2.7 cm SL male/unsexed; (Ref. 12769); 2.8 cm SL (female)
Morphology | Morphometrics
Differs from all congeners by having the following characters: second ctenactinium with eight serrae in adult males; 28 caudal vertebrae with no sexual dimorphism in the number of precaudal vertebrae; 28 or more teeth on paradentary; all males are sinistral (Ref. 90869).
Fertilization is internal and eggs are attached to the substrate via adhesive filaments (Ref. 43413).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Pelvic fins in males are modified to form part of a complex thoracic clasping organ (Ref. 205).
Parenti, L.R., 1996. Phylogenetic systematics and biogeography of phallostethid fishes (Atherinomorpha, Phallostethidae) of northwestern Borneo, with description of a new species. Copeia 1996(3):703-712. (Ref. 12769)
IUCN Red List Status (Ref. 124695)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 28.2 - 29.1, mean 28.7 °C (based on 198 cells).
Phylogenetic diversity index (Ref. 82805
= 0.6250 [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 ±0.4 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .