Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Trachichthyiformes (Roughies) >
Trachichthyidae (Slimeheads)
Etymology: Hoplostethus: Greek, hoplon = weapon + Greek, stetho, stethion = brest; literal = to prick a little breast (Ref. 45335); roseus: Name from Latin 'rose', referring to the rosy colouration dorsally on the body and on the dorsal, pectoral and caudal fins of fresh specimens.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 200 - 400 m (Ref. 129008). Subtropical
Distribution
Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Western Pacific: Japan, Taiwan and New Caledonia.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 21.4 cm SL male/unsexed; (Ref. 129008); 24.7 cm SL (female)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 12 - 13; Anal spines: 3; Anal soft rays: 9 - 10; Vertebrae: 26. This species is distinguished from its congeners by the following set of characters: pyloric caeca 65-84; predorsal scales 18-22; pectoral-fin rays 14-17 (modally 15-16); total gill rakers on first-gill arch 18-19; HF1 2.2%-3.7% SL; HF2 5.1%- 6.0% SL; postorbital width 17.1%-20.6% SL. Colouration: oral cavity, branchial cavity, top and underside of tongue, and peritoneum are uniformly black; base of caudal fin brownish; spinous dorsal-fin membrane with black distal margin. (Ref. 129008).
The mature female specimen (24.7 cm SL) with well-developed eggs and the male specimen (21.4 cm SL) with well-developed testes; females (19.5-20.9 cm SL) with mature eggs, suggests that this species is a small species, which reproduces at a length c. 20.0 cm SL (Ref. 129008).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Su, Y., H.-C. Lin and H.-C. Ho, 2022. Hoplostethus roseus, a new roughy fish from the western Pacific based on morphology and DNA barcoding (family Trachichthyidae). J. Fish Biol. 101(3):441-452. (Ref. 129008)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01660 (0.00714 - 0.03859), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (20 of 100).
