Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Triakidae
(Houndsharks) > Triakinae
Etymology: Mustelus: Latin for weasel, an ancient name for sharks, possibly referring to the pointed snouts, swift movements and/or rapacious feeding behavior of smaller predatory sharks [strictly not tautonymous with Squalus mustelus Linnaeus 1758 since type was designated by the ICZN]. (See ETYFish); norrisi: In honor of American zoologist Harry Waldo Norris (1862-1946), Grinnell College (Iowa), who studied the cranial nerves of the Spiny Dogfish Squalus acanthias. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 1 - 100 m (Ref. 55584), usually 3 - 40 m (Ref. 55311). Subtropical; 32°N - 36°S, 99°W - 47°W (Ref. 55311)
Western Atlantic: Florida, USA and the northern Gulf of Mexico to Venezuela; also southern Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 110 cm TL male/unsexed; (Ref. 40637); common length : 80.0 cm TL male/unsexed; (Ref. 5217); max. published weight: 13.8 kg (Ref. 40637)
Found on the continental shelves, on muddy or sandy bottoms to about 80 m depth. Feeds on crabs and shrimps, and also bony fishes. Viviparous (with a yolk-sac placenta), with 7 to 14 young in a litter. Size at birth 30 cm.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Viviparous (with a yolk-sac placenta) (Ref. 244). Distinct pairing with embrace (Ref. 205).
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. 125652)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 22.6 - 28, mean 25.7 °C (based on 450 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00170 (0.00095 - 0.00304), b=3.11 (2.96 - 3.26), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.9 ±0.67 se; based on food items.
Resilience (Ref. 120179
): Very Low, minimum population doubling time more than 14 years (Fec=7).
Fishing Vulnerability (Ref. 59153
): High to very high vulnerability (66 of 100).