Actinopterygii (ray-finned fishes) > Myctophiformes
(Lanternfishes) > Myctophidae
(Lanternfishes) > Myctophinae
Etymology: Krefftichthys: Named for Dr. Gerhard Krefft (Institut fur Seefischerei, Hamburg) for his pioneering work and
contributions to the knowledge of deep-sea fishes..
Environment: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; oceanodromous (Ref. 51243); depth range ? - 2700 m (Ref. 58018). Deep-water; 32°S - 78°S
Ranges from the Antarctic Divergence/Weddell-Scotia Confluence to the northern boundary limits (usually considered to coincide with the geographic location of the Subtropical Convergence), and further north in meridional currents: to 32°-33°S in Peruvian Current and to 34°S in Falkland Current.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.1 cm SL male/unsexed; (Ref. 5182)
Oceanic (Ref. 4066). Found in the upper 50-100 m south of Antarctic Polar Front at night, but deeper (500-600 m) north of Antarctic Polar Front and at depths greater than 1,000 m at Subtropical Convergence. Feeds mainly on copepods, and also on euphausiids and amphipods.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Hulley, P.A., 1990. Myctophidae. p. 146-178. In O. Gon and P.C. Heemstra (eds.) Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa. (Ref. 5182)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 0.4 - 7.5, mean 3.1 (based on 444 cells).
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00191 - 0.01092), b=3.10 (2.88 - 3.32), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.19 se; Based on food items.
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (29 of 100) .