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: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; depth range 200 - 3000 m (Ref. 51657). Deep-water; 20°S - 68°S
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).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.3 cm SL male/unsexed; (Ref. 5189)
Trawled below 200 m (Ref. 4241). Young are found in warmer and more northern waters.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. (Ref. 5189)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): High vulnerability (56 of 100) .