Actinopteri (ray-finned fishes) > Perciformes/Scorpaenoidei
(Scorpionfishes) > Aploactinidae
Etymology: Cocotropus: Greek, kokkos = berry, seed + Greek, tropsis, tropo = turning (Ref. 45335); possi: Named for Dr. Stuart G. Poss, in recognition of his outstanding contributions to aploactinid systematics.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range - m (Ref. ), usually - m (Ref. ). Temperate; 0°C -
Northwest Pacific: Japan.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.5 cm SL male/unsexed; (Ref. 75210)
Morphology | Morphometrics
soft rays: 7;
Vertebrae: 26. This species is characterized by the following: D XIII, 8;, pectoral-fin rays 13; vertebrae 26; preopercular spines 5; upper jaw longer than lachrymal; fleshy papillae on posterior portion of maxilla absent; vomerine teeth absent; many well-developed fleshy papillae on ventral surface of lower jaw; first sensory pores on both sides of lower jaw separate; isthmus tip extending to level of between fourth and fifth sensory pores of lower jaw; body mostly uniformly dark brown (Ref. 75210).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Imamura, H. and G. Shinohara, 2008. A new species of Cocotropus (Teleostei: Aploactinidae) from the Ryukyu Islands, Southern Japan. Bull. Natl. Mus. Nat. Sci. Ser. A. Suppl. 2:21-24. (Ref. 75210)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 20.3 - 23.4, mean 21.7 °C (based on 24 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.2 ±0.4 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .