Teleostei (teleosts) >
Perciformes/Scorpaenoidei (Scorpionfishes) >
Aploactinidae (Velvetfishes)
Etymology: Cocotropus: Greek, kokkos = berry, seed + Greek, tropsis, tropo = turning (Ref. 45335); izuensis: Named for the Izu Peninsula, where most of the examined specimens were collected.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; benthopelagic; depth range 8 - 25 m (Ref. 83999). Subtropical
Northwest Pacific: Japan.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 4.7 cm SL male/unsexed; (Ref. 83999)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 11 - 13; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 6 - 8; Vertebrae: 26. This species is distinguished by the following characters: D XII spines; segmented lower caudal-fin rays 7; vertebrae 26; preopercular spines 5; upper jaw length equal to or a little shorter than lachrymal length; absence of distinct fleshy papillae on posterior portion of upper jaw; vomerine teeth absent; first lower jaw sensory pores on both sides fused; anterior position of isthmus well beyond fifth lower jaw sensory pore; 4 dorsal-fin spines anterior to third neural spine; interneural space between seventh and eighth neural spines with no dorsal-fin spine proximal pterygiophores (Ref. 83999).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Imamura, H., M. Aizawa and G. Shinohara, 2010. Cocotropus izuensis, a new species of velvetfish (Teleostei: Aploactinidae) from Japan. Bull. Natl. Mus. Nat. Sci., Ser. A, (Suppl. 4):1-7. (Ref. 83999)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01288 (0.00419 - 0.03963), b=3.03 (2.77 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.3 ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).