Elasmobranchii (sharks and rays) > Heterodontiformes
(Bullhead and horn sharks) > Heterodontidae
(Bullhead, horn, or Port Jackson sharks)
Etymology: Heterodontus: Greek, heteros = other + Greek, odous = teeth (Ref. 45335).
Environment / Climate / Range
Marine; demersal; depth range 2 - 150 m (Ref. 9253), usually 2 - 11 m (Ref. 9253). Subtropical; 37°N - 15°S, 124°W - 75°W
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 59 - ? cm
Max length : 122 cm TL male/unsexed; (Ref. 247); common length : 97.0 cm TL male/unsexed; (Ref. 247); max. reported age: 12 years (Ref. 72467)
Eastern Pacific: central California, USA to the Gulf of California, and probably Ecuador and Peru.
Sluggish, nocturnal, and mostly solitary species. Inhabit rocky bottoms, kelp beds, sandy draws between rocks, on sand flats, deep crevices and small caves and also large underwater caverns. Adults tend to return to the same resting place every day (Ref. 43278). Feed on benthic invertebrates, especially sea urchins, crabs and probably abalone, also fishes. Oviparous (Ref. 50449). May bite back when harassed. Has broad muscular paired fins used as limbs for clambering on the bottom. Catch reduced to fish meal; fin spines used in production of jewels.
Compagno, L.J.V., 2001. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Vol. 2. Bullhead, mackerel and carpet sharks (Heterodontiformes, Lamniformes and Orectolobiformes). FAO Spec. Cat. Fish. Purp. 1(2):269p. Rome: FAO.
IUCN Red List Status (Ref. 90363)
Fisheries: minor commercial; aquarium: public aquariums
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.5059 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), based on all LWR estimates for this BS (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.4 se; Based on diet studies.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Fec=20).
Vulnerability (Ref. 59153
): High vulnerability (60 of 100) .