Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Carcharhinidae
Etymology: Carcharhinus: Greek, karcharos = sharpen + Greek, rhinos = nose (Ref. 45335); coatesi: Named for George Coates, who collected many elasmobranchs and fishes in North Queensland.
Environment / Climate / Range
Marine; reef-associated; depth range 123 - ? m (Ref. 89954). Tropical, preferred ?
East Indian to Western Pacific: Australia and possibly off New Guinea.
Size / Weight / Age
Maturity: Lm ?  range ? - 70 cm
Max length : 87.0 cm TL male/unsexed; (Ref. 89954); 88.0 cm TL (female)
Morphology | Morphometrics
This species is distinguished by the following characters: moderately long and narrowly rounded snout; oblique and blade-like upper anterior teeth are coarsely serrated, lateral margin deeply notched, with several large and smooth basal cusplets; lower anterior teeth are narrower, slightly oblique, with lateral margins notched and usually several smooth basal cusplets; total tooth row counts 24-26/23-25, or 47-51; interdorsal space with ridge on midline, 18.0-23.1% TL; moderately tall and slightly falcate first dorsal fin, its origin just anterior to pectoral-fin free rear tip, length 14.8-17.3% TL, 1.5-1.9 times height, inner margin 2.0-2.8 in base; a much smaller second dorsal fin, broadly triangular, height 28-37% of first dorsal-fin height, origin about opposite to anal-fin origin; falcate anal fin, its height 0.9-1.4 times second dorsal height, base 0.9-1.2 times second dorsal-fin base; body colour pale brownish to grey dorsally, whitish ventrally; second dorsal fin with a black blotch on upper one to two thirds of fin, not extending onto upper surface of body and well defined from ground colour; other fins are plain or with pale outer margins; total vertebral counts 134-147; monospondylous precaudal counts 42-50; diplospondylous precaudal counts 22-33; diplospondylous caudal counts 64-73; precaudal counts 67-76 (Ref. 89954).
Reproduction of this species apparently not seasonal, with litter size of 1-3 (mean 2) and size at birth of 38.0-40.0 cm TL (Ref. 89954).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
White, W.T., 2012. A redescription of Carcharhinus dussumieri and C. sealei, with resurrection of C. coatesi and C. tjutjot as valid species (Chondrichthyes: Carcharhinidae). Zootaxa 3241:1-34. (Ref. 89954)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00537 (0.00242 - 0.01194), b=3.09 (2.91 - 3.27), based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.0 ±0.6 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate vulnerability (37 of 100) .