Elasmobranchii (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Pentanchidae (Deepwater catsharks)
Etymology: Galeus: galeos, a small shark or dogfish according to Aristotle and others (See ETYFish); gracilis: Latin for thin or slender, referring to its firm, slender body (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 290 - 470 m (Ref. 11146). Tropical; 10°S - 28°S
Indo-West Pacific: northern Australia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 34.0 cm TL male/unsexed; (Ref. 11146)
Dorsal spines (total): 0; Anal spines: 0. Bold saddle markings on body and precaudal tail, but without dark markings on the terminal and hypural caudal-fin lobes (Ref. 11146).
Body shape (shape guide): elongated.
A rare, little-known bottom-dwelling catshark found on the uppermost continental slopes (Ref. 11146). Mode of reproduction unknown (Ref. 11146).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Compagno, L.J.V. and V.H. Niem, 1998. Scyliorhinidae. Catsharks. p. 1279-1292. In K.E. Carpenter and V.H. Niem (eds.) FAO Identification Guide for Fishery Purposes. The Living Marine Resources of the Western Central Pacific Vol. 2. Rome: FAO. (Ref. 11146)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Threat to humans
Harmless
Human uses
Fisheries: of no interest
Tools
Special reports
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00347 (0.00171 - 0.00701), b=3.09 (2.91 - 3.27), 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 size and trophs of closest relatives |
Resilience (Ref. 120179) |
Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100). |
Fishing Vulnerability (Ref. 59153) |
Low vulnerability (20 of 100). 🛈 |