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Elasmobranchii (sharks and rays) > Carcharhiniformes (Ground sharks) > Sphyrnidae (Hammerhead, bonnethead, or scoophead sharks)
Etymology: Sphyrna: Probable misspelling of sphyra (Gr.), hammer, referring to their hammer-shaped heads (See ETYFish); corona: Latin for crown or halo, allusion not explained, probably referring to irregularly oval oculonarial expanse (See ETYFish).

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

Marine; demersal; depth range 0 - 100 m (Ref. 121788). Tropical; 32°N - 19°S, 115°W - 69°W

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

Eastern Pacific: southern Mexico to northern Peru, probably including the Gulf of California.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 92.0 cm TL male/unsexed; (Ref. 244)

Found on the continental shelf, presumably inshore. Viviparous, presumably with 2 young per litter. Probably the smallest species of hammerhead.

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

Viviparous, placental (Ref. 50449).

Main reference Upload your references | References | Coordinator : Compagno, Leonard J.V. | Collaborators

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. 130435: Version 2024-2)

Critically Endangered (CR) (A2bcd); Date assessed: 07 February 2019

CITES

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: subsistence fisheries

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 15.9 - 25.2, mean 20.8 °C (based on 20 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5029 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00347 (0.00153 - 0.00788), b=3.12 (2.93 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.9 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Very Low, minimum population doubling time more than 14 years (Fec=2).

Fishing Vulnerability (Ref. 59153): High vulnerability (57 of 100).

Price category (Ref. 80766): High.

Nutrients (Ref. 124155): Calcium = 41 [7, 209] mg/100g; Iron = 0.753 [0.193, 2.177] mg/100g; Protein = 19.5 [17.4, 21.6] %; Omega3 = 0.127 [0.054, 0.310] g/100g; Selenium = 50.5 [12.3, 139.9] μg/100g; VitaminA = 11.9 [4.4, 30.6] μg/100g; Zinc = 0.739 [0.361, 1.345] mg/100g (wet weight);

Sphyrna corona Springer, 1940