Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Glaucostegidae (Giant guitarfishes)

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

Marine; benthopelagic; depth range 0 - 100 m (Ref. 114953). Subtropical; 28°N - 12°N, 33°E - 68°E (Ref. 114953)

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

Western Indian Ocean; Persian Gulf, and Arabian and Red Seas.

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 83 - ? cm
Max length : 120 cm WD male/unsexed; (Ref. 8630)

A benthic species often found in very shallow water near the coast and offshore on the continental shelf (Ref. 9909, Ref.114953). Feed on small mollusks and bony fishes (Ref. 12951). Ovoviviparous (Ref. 50449). Produces up to 10 pups a litter, mainly from May to October (in the Red Sea region) (Ref. 114953). Size at least 171 cm TL. Males matures at ca. 83 cm TL, birth size at ca. 29 cm TL (Ref.114953). Utilized where it occurs but information lacking (Ref. 9909).

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

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449).

Main reference Upload your references | References | Coordinator | Collaborators

Compagno, L.J.V., 1999. Checklist of living elasmobranchs. p. 471-498. In W.C. Hamlett (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes. Johns Hopkins University Press, Maryland. (Ref. 35766)

IUCN Red List Status (Ref. 130435: Version 2024-2)

Critically Endangered (CR) (A2bd); Date assessed: 03 December 2018

CITES

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: bycatch

FAO - Publication: search | FishSource |

More information

Trophic ecology
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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Preferred temperature (Ref. 123201): 24.7 - 29.1, mean 27.9 °C (based on 1002 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00389 (0.00141 - 0.01074), b=3.05 (2.82 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.1 ±0.67 se; based on food items.

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Very high vulnerability (90 of 100).

Price category (Ref. 80766): Low.

Glaucostegus halavi (Fabricius, 1775)