Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 350 - 430 m (Ref. 91153). Deep-water
North Central Pacific: Kyushu-Palau Ridge and Emperor Seamounts.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.8 cm SL male/unsexed; (Ref. 10940)
Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 3; Anal soft rays: 5; Vertebrae: 25. This species is distinguished by the following set of characters: 9 dorsal-fin rays 9; 17-19 pectoral-
fin rays; ctenoid scales in interorbital space and cycloid scales on belly; origin of the first dorsal-fin spine is slightly posterior to a vertical drawn through supracleithral spine base; posterior tip of pectoral fin do not reach the anal-fin origin; head length 44.4-46.0% SL (Ref. 91153).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Ishida, M. and K. Amaoka, 1992. A new species of the fish genus Idiastion (Pisces: Scorpaenidae) from the Kyushu-Palau Ridge, Western Pacific. Jap. J. Ichthyol. 38(4):357-360. (Ref. 10940)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Threat to humans
Harmless
Human uses
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Special reports
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Estimates based on models
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01288 (0.00623 - 0.02664), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trophic level (Ref. 69278) |
3.7 ±0.6 se; based on size and trophs of closest relatives |
Resilience (Ref. 120179) |
Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.). |
Fishing Vulnerability (Ref. 59153) |
Low to moderate vulnerability (33 of 100). 🛈 |