Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Pentanchidae
Etymology: Galeus: galeos, a small shark or dogfish according to Aristotle and others. (See ETYFish); eastmani: Patronym not identified, probably in honor of American geologist and paleontologist Charles Rochester Eastman (1868-1918), a specialist in fossil fishes. (See ETYFish).
More on authors: Jordan & Snyder.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal. Deep-water; 34°N -
Western Pacific: off Japan and the East China Sea; possibly Viet Nam (Ref. 11146). Recorded in the Philippines during the MUSORSTOM November 1980 cruise.
Length at first maturity / Size / Weight / Age
Maturity: Lm 36.5, range 36 - 37 cm
Max length : 40.0 cm TL male/unsexed; (Ref. 11146)
A little-known, but very common shark, found in deep water near the bottom (Ref. 11146). Maximum length of at least 40 cm TL, probably reaching 50 cm (Ref. 11146).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous, with a single egg laid per oviduct (Ref. 244). Embryos feed solely on yolk (Ref. 50449).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
IUCN Red List Status (Ref. 125652)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 2.6 - 5.8, mean 3.8 °C (based on 706 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00347 (0.00168 - 0.00717), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.9 ±0.2 se; based on diet studies.
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100).
Nutrients (Ref. 124155
): Calcium = 15 [2, 56] mg/100g ; Iron = 0.307 [0.078, 0.868] mg/100g ; Protein = 16.1 [13.2, 19.1] % ; Omega3 = 0.232 [0.091, 0.548] g/100g ; Selenium = 6.99 [2.14, 21.42] μg/100g ; VitaminA = 28.7 [7.3, 102.6] μg/100g ; Zinc = 0.377 [0.176, 0.795] mg/100g (wet weight);