Teleostei (teleosts) >
Perciformes/Scorpaenoidei (Scorpionfishes) >
Scorpaenidae (Scorpionfishes or rockfishes) > Scorpaeninae
Etymology: Phenacoscorpius: Greek, phenax, -akos = deceptive + Greek, skorpion = scorpion (Ref. 45335); longilineatus: Name from Latin word meaning long line, referring to the long lateral line, associated with the greatest
number of pored lateral-line scales in the genus.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathypelagic; depth range 345 - 1089 m (Ref. 92845). Deep-water
Southwestern Pacific: New Caledonia and New Zealand.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 10.5 cm SL male/unsexed; (Ref. 92845)
Short description
Identification keys | Morphology | Morphometrics
This species is distinguished by the following set of characters: pectoral-fin rays 16-18 (mode 17), middle rays branched in young and adults; pored lateral-line scales 8-18 (mode 12), with last pored scale situated from below base of seventh spine to below base of fourth dorsal-fin soft rays; scale rows in longitudinal series 50-52; gill rakers 18-21 (mode 20); no slit behind fourth gill arch; palatine teeth present; second preopercular spine always absent; nuchal and parietal spines distinct; suborbital spines in young and adults 4-6 (mode 5) and in larger adults 6-7; nape and anterior part of body strongly arched in adults of over ca. 80 mm SL; relatively long postnuchal-spine length, 5.0-9.7% (mean 7.2%) of SL; relatively short caudal fin length, 2.4-26.7% (mean 23.4%) of SL; black spots on posterior half of caudal peduncle 1-5 (mode 2); body usually uniformly whitish without distinct dark saddles in preserved specimens (Ref. 92845).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Motomura, H., R. Causse and C.D. Struthers, 2012. Phenacoscorpius longilineatus, a new species of deepwater scorpionfish from the Southwestern Pacific Ocean and the first records of Phenacoscorpius adenensis from the Pacific Ocean (Teleostei: Scorpaenidae). Species Diversity 17:151-160. (Ref. 92845)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201): 3.2 - 4.8, mean 4.3 °C (based on 138 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01778 (0.00689 - 0.04588), b=3.04 (2.82 - 3.26), 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): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
