Myxini (hagfishes) > Myxiniformes
(Hagfishes) > Myxinidae
(Hagfishes) > Eptatretinae
Etymology: Eptatretus: Greek, epta = seven + Greek, tretos, -e, -on = with holes (Ref. 45335); goliath: Named for the Philistine giant of biblical fame; noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
Marine; benthopelagic; depth range - 811 m (Ref. 57440), usually - m (Ref. ). Subtropical; 0°C -
Southwest Pacific: off New Zealand.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 127.5 cm TL (female); max. published weight: g
Morphology | Morphometrics
Diagnosis: Distinguished from its congeners by the unique combination of the following characters: 7 pairs of gill pouches; 3-cusp multicusps in anterior and posterior rows; 11-13 unicusps in anterior rows; 9 unicusps in posterior rows; 54 total cusps; 14-15 prebranchial pores; 57-58 trunk pores; 13-14 tail pores; 92 total pores; ventral finfold prominent (Ref. 57440).
Adult female holotype had dozens of small eggs, 45 X 14 mm, in the mesentery, which was attached to the body wall. The eggs did not have terminal anchor filaments and hooks (Ref. 57440).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Mincarone, M.M. and A.L. Stewart, 2006. A new species of giant seven-gilled hagfish (Myxinidae: Eptatretus) from New Zealand. Copeia 2006(2):225-229. (Ref. 57440)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00095 - 0.00438), b=2.92 (2.73 - 3.11), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.7 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Vulnerability (Ref. 59153
): High to very high vulnerability (67 of 100) .