Glyphis garricki

Compagno, White & Last, 2008

Northern river shark
Classification: Elasmobranchii Carcharhiniformes Carcharhinidae

Reference of the original description
Compagno, L.J.V. & White, W.T. & Last, P.R. (2008)
Glyphis garricki sp. nov., a new species of river shark (Carcharhiniformes: Carcharhinidae) from northern Australia and Papua New Guinea, with a redescription of Glyphis glyphis (Müller & Henle, 1839), CSIRO Marine and Atmospheric Research Paper, 22, 203–226

Image of the original description

Glyphis garricki sp. nov, fresh holotype CSIRO H 5262–01 (female 670 mm TL) In: COMPAGNO, L.J.V. & WHITE, W.T. & LAST, P.R. (2008): Glyphis garricki sp. nov, a new species of river shark (Carcharhiniformes: Carcharhinidae) from northern Australia and Papua New Guinea, with a redescription of <i>Glyphis glyphis</i> (Müller & Henle, 1839), CSIRO Marine and Atmospheric Research Paper, 22: 203-226

Description :

Citation: Glyphis garricki Compagno, White & Last, 2008: In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 07/2022

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Glyphis garricki COMPAGNO, WHITE & LAST, 2008, © Peter M. Kyne, Charles Darwin University, Australia
Common names
eng Northern river shark

Short Description
Original diagnosis of COMPAGNO, WHITE & LAST, 2008 [3346]: A species of Glyphis with an elongated snout, more flattened in lateral view than Glyphis glyphis. Closest distance from mouth to nostril about 1.5 times nostril width. Lips not concealing teeth when mouth is closed. Upper symphysis about an eye diameter in front of anterior eye margin. Interdorsal space 16.1–21.2% TL. Anterior margins of pectoral fins weakly convex, pectoral length 12.9–13.8% TL. Pelvic fin anterior margins 7.6–9.1% TL and 35–46% of pectoral anterior margin, height 6.9– 8.1% TL. First dorsal fin triangular, with nearly straight posterior margin; free rear tip well anterior to pelvic origins; length 16.7–18.7% TL. Second dorsal fin length 10.2–12.5% TL, anterior margin 8.6–9.9% TL, base 6.6– 8.4% of total length and 1.0–1.4 times second dorsal fin height; height 5.8–6.9% TL and 58–66% of first dorsal fin height. Anal fin height 4.6–5.3% TL and 72–84% of second dorsal height, base 83–98% of second dorsal-fin base. Caudal-fin subterminal margin deeply concave. Total vertebral counts 137–151; monospondylous precaudal counts 44–50 and 31–34% of total counts; diplospondylous precaudal counts 28–34 and 20–24% of total counts; diplospondylous caudal counts 61–70 and 44–48% of total counts; precaudal counts 73–83 and 52–56% of total counts. Watermark boundary more than eye diameter below eye, visible below eyes on ventral view of head; watermark boundary sharply defined and jagged along trunk in young, about nostril width above pelvic-fin bases. No discrete blackish blotch at base of dorsal pectoral-fin; pectoral fin without a blackish blotch at ventral tip. Anal fin with a light distal web. Terminal caudal lobe with narrow black tip and terminal margin, ventral caudal lobe with black apical blotch.

Indo-West Pacific: Australia (salinities 6-26 and 32-36.6) and New Guinea. [3346]

Size / Weight / Age
145 cm TL (male/unsexed; [3346]); 251 cm TL (female)

pelagic-oceanic; brackish; marine; depth range ? - 11 m [3346]

Lower anterior teeth with smooth proximal cusps and hastate, serrated, edged tips but without cusplets. Anteroposterior tooth row counts 15–17/14–17; total tooth row counts 31–34/30–35, or 62–68. [3346]

shark-references Species-ID=2534;