Actinopterygii (ray-finned fishes) > Stephanoberyciformes
(Pricklefishes, bigscales and gibberfishes) > Melamphaidae
(Bigscale fishes or ridgeheads)
Etymology: Sio: Acronym of Scripps Institute of Oceanography (Ref. 45335).
Environment / Climate / Range
Marine; bathypelagic; depth range 200 - 3000 m (Ref. 51657). Deep-water; 20°S - 68°S
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.3 cm SL male/unsexed; (Ref. 5189)
Atlantic, Indian and Pacific: south of 20°S. A single specimen was recorded from the Eastern Central Pacific (Ref. 5189). Record from the North Pacific (Moss, 1962) is in error (Ref. 51657).
Trawled below 200 m (Ref. 4241). Young are found in warmer and more northern waters.
Gon, O., 1990. Melamphaidae. p. 218-221. In O. Gon and P.C. Heemstra (eds.) Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa.
IUCN Red List Status (Ref. 90363)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01020 (0.00385 - 0.02704), b=3.04 (2.81 - 3.27), based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic Level (Ref. 69278
): 3.5 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .