Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Myxini (hagfishes) > Myxiniformes
(Hagfishes) > Myxinidae
(Hagfishes) > Myxininae
Etymology: Myxine: Greek, 'myxa' from mucus or slime, referring to slime production (Ref. 45335, 117245); greggi: Named for John Gregg, founder and president of the Western Flyer Foundation.
Environment: milieu / climate zone / depth range / distribution range
Marine; benthopelagic; depth range 688 - 815 m (Ref. 123790), usually - m (Ref. ). Deep-water; 0°C -
Southeast Pacific: Galapagos Is.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 51.5 cm TL male/unsexed; (Ref. 123790)
Morphology | Morphometrics
This species is distinguished from all its congeners, except M.affinis, M.australis, M. glutinosa, M. limosa, M. hubbsi, M. hubbsoides, M. jespersenae, M. knappi, M. kuoi, M. mcmillanae, M. paucidens, M. sotoi, M. martinii, by the following characters: gill pouches 6 pairs and a 2/2 multicusp pattern of teeth; differs from its congeners by number of total cusps 34-40 (vs. 30-32 in M. kuoi, 42-88 in M. mcmillanae, 26 in M. paucidens); prebranchial pores 22-26 (vs. 30-31 M. hubbsoides, 28-37 in M. jespersenae, 30-38 in M. knappi, 28-38 in M. sotoi); trunk pores 58-66 (vs. 68-71 in M. hubbsoides, 52-54 in M. martinii); total pores 91-102 (vs. 111-116 in M. hubbsoides, 107-121 in M. jespersenae); with one single conspicuous nasal-sinus papilla in the mid-dorsal surface of the nasal sinus (vs. two bilaterally symmetrical nasal-sinus papillae in M. jespersenae); colour pattern with its body dark brown with white head (vs. body entirely pigmented, without white head, in M. affinis, M. australis, M. hubbsoides, M. knappi, M. kuoi, M. paucidens); further differs from M. hubbsi by the well-developed ventral finfold, 3-7 mm high (vs. vestigial to low, 1-2 mm high) (Ref. 123790).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Mincarone, M.M., D. Plachetzki, C.L. McCord, T.M. Winegard, B. Fernholm, C.J. Gonzalez and D.S. Fudge, 2021. Review of the hagfishes (Myxnidae) from the Galapagos Islands, with descriptions of four new species and their phylogenetic relationships. Zool. J. Linn. Soc. 192(2):453-474. (Ref. 123790)
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
= No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.6 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Moderate vulnerability (43 of 100) .