Elasmobranchii (sharks and rays) >
Torpediniformes (Electric rays) >
Narcinidae (Numbfishes)
Etymology: lasti: Named for Dr. Peter R. Last, in recognition of his studies in the taxonomy and distribution of Australian elasmobranchs.
Eponymy: Dr Peter Robert Last is an eminent Australian ichthyologist who is the senior taxonomist and Senior Principal Research Scientist at CSIRO Marine and Atmospheric Research Hobart. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 178 - 350 m (Ref. 75154). Tropical; 8°S - 32°S, 111°E - 132°E (Ref. 114953)
Eastern Indian Ocean: Australia (Western Australia to off the Northern Territory) and Arafura Sea (SE Indonesia, south of Tanimbar I.).
Size / Weight / Age
Maturity: Lm ?  range ? - 24 cm
Max length : 36.5 cm TL male/unsexed; (Ref. 93928)
Short description
Identification keys | Morphology | Morphometrics
This species is distinguished by the following characters: tail length as measured from cloaca much longer than disc width or length (means: tail length 53.7% of TL, vs. disc width 40.3% of TL and disc length 42.1% TL); nasal curtain much wider than long; colour pattern dorsally uniform light yellowish-brown, which is also present over preorbital snout region, no distinctive spotting or markings over disc and tail; low and inconspicuous lateral tail ridge, not resembling a distinct fold; mean preorbital snout length just over 10% of TL (Ref. 93928).
Body shape (shape guide): other.
Usually found over sandy and muddy bottoms (Ref. 93928). Maturity size reaches at ca. 24 cm TL; born at ca. 7-8 cm TL. Biology little known (Ref. 114953).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
de Carvalho, M.R. and B. Séret, 2002. Narcine lasti: a new species of numbfish from Western Australia and Indonesia (Chondrichthyes: Torpediniformes: Narcinidae). Rec. Western Australia Mus. 20:393-408. (Ref. 93928)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01175 (0.00470 - 0.02937), b=2.88 (2.66 - 3.10), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trophic level (Ref. 69278) |
3.3 ±0.4 se; based on size and trophs of closest relatives |
Resilience (Ref. 120179) |
Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100). |
Fishing Vulnerability (Ref. 59153) |
Low vulnerability (19 of 100). 🛈 |