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Elasmobranchii (sharks and rays) > Carcharhiniformes (Ground sharks) > Pentanchidae (Deepwater catsharks)
Etymology: Bythaelurus: bythos (Gr.), depths of the sea, referring to its deepwater habitat; ailouros (Gr.), cat, probably an allusion to the vernacular “catshark,” so named for its cat-like eyes (See ETYFish); stewarti: In honor of the late Rob Stewart (1979-2017), Canadian filmmaker and shark conservationist, who “inspired the second author and stimulated her interest in sharks” (he died from hypoxia while diving off Islamorada, Florida, USA) (See ETYFish).
Eponymy: Rob Stewart (1979–2017) was a Canadian filmmaker, freelance journalist, underwater photographer and conservationist. [...] (Ref. 128868), visit book page.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; bathydemersal; depth range 380 - 420 m (Ref. 119368). Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Northwestern Indian Ocean: Error Seamount (Mount Error Guyot). Apparently a microendemic species restricted to this isolated Seamount.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 42.5 cm TL male/unsexed; (Ref. 119368)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Weigmann, S., C.J. Kaschner and R. Thiel, 2018. A new microendemic species of the deepwater catshark genus Bythaelurus (Carcharhiniformes, Pentanchidae) from the northwestern Indian Ocean, with investigations of its feeding ecology, generic review and identification key. PLoS ONE 13(12):e0207887. (Ref. 119368)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Data deficient (DD) ; Date assessed: 21 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Trophic ecology
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Ecology
Ecology

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Growth parameters
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Length-weight rel.
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Length-frequencies
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Life cycle
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Anatomy
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Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00355 (0.00175 - 0.00721), 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): 4.3 ±0.5 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Preliminary low fecundity).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (33 of 100).

Bythaelurus stewarti Weigmann, Kaschner & Thiel, 2018