Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Carcharhinidae
Etymology: Isogomphodon: iso-, from isos (Gr.), equal; gomphos (Gr.), nail; odon (Gr.), tooth, referring to how teeth are equally fastened, i.e., claviform and straight in both jaws. (See ETYFish); oxyrhynchus: oxys (Gr.), sharp; rhynchus (L.), snout, referring to its elongated, pointed and narrow snout [authorship often attributed to Müller & Henle, who published Valenciennes’ description]. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; demersal; depth range ? - 15 m (Ref. 13608). Tropical; 12°N - 20°S, 63°W - 34°W (Ref. 244)
Western Atlantic: Trinidad, Guyana, Suriname, French Guiana, and Brazil.
Length at first maturity / Size / Weight / Age
Maturity: Lm 115.0  range ? - ? cm
Max length : 160 cm TL male/unsexed; (Ref. 34266); common length : 100.0 cm TL male/unsexed; (Ref. 5217); max. reported age: 12 years (Ref. 34266)
Large number of teeth, great length of very narrow snout. Yellow-gray above and white below (Ref. 6032).
An inshore shark found over rocky bottoms, entering estuaries and river mouths. Feeds on small schooling fishes including herring, anchovies and croakers. Viviparous, generally 4 embryos per brood; size at birth 38 to 41 cm. 244 cm record unconfirmed.
Distinct pairing with embrace (Ref. 205). Viviparous, placental (Ref. 50449).
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. 126983)
Fisheries: subsistence fisheries
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 27 - 27.8, mean 27.5 °C (based on 149 cells).
Phylogenetic diversity index (Ref. 82804
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00234 - 0.01075), 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
): 4.5 ±0.80 se; based on food items.
Generation time: 10.0 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resilience (Ref. 120179
): Very Low, minimum population doubling time more than 14 years (K=0.11-0.12; tm=5-7; tmax=12; Fec=4).
Fishing Vulnerability (Ref. 59153
): High to very high vulnerability (74 of 100).
Nutrients (Ref. 124155
): Calcium = 25.1 [3.3, 144.5] mg/100g ; Iron = 0.725 [0.183, 2.103] mg/100g ; Protein = 21.1 [18.8, 23.3] % ; Omega3 = 0.16 [0.06, 0.40] g/100g ; Selenium = 29.2 [7.9, 91.1] μg/100g ; VitaminA = 18.4 [5.8, 57.1] μg/100g ; Zinc = 0.728 [0.335, 1.386] mg/100g (wet weight);