Editing Ganges shark (section)

==Physical appearance==
''G. gangeticus'' is a little-known species that is yet to be adequately described.<ref>{{cite journal |last=Martin |first=R. A. |title=Conservation of freshwater and euryhaline elasmobranchs: a review |journal=[[Journal of the Marine Biological Association of the United Kingdom]] |year=2005 |volume=85 |issue=5 |pages=1049–1073 |doi=10.1017/s0025315405012105|bibcode=2005JMBUK..85.1049M |citeseerx=10.1.1.533.4292 |s2cid=52833147 }}</ref> Its size at birth is {{convert|56|to|61|cm|abbr=on}}, growing to an estimated {{convert|178|cm|abbr=on}} at maturity, with a maximum size of about {{convert|204|cm|abbr=on}}.<ref name="Compagno2005">{{cite book |last=Compagno |first=L. J. V. |title='Ganges shark Glyphis gangeticus'. In: Fowler, S.L., Cavanagh, R.D., Camhi, M., Burgess, G.H., Cailliet, G.M., Fordham, S.V., Simpfendorfer, C.A. and Musick, J.A. (eds). Sharks, rays and chimaeras: the status of the Chondrichthyan fishes. |year=2005 |publisher=IUCN Species Survival Commission Shark Specialist Group, IUCN |location=Gland, Switzerland, and Cambridge, UK. |pages=305–306}}</ref> The size at birth or maturity is unknown for any other ''Glyphis'' species.<ref name=Martin>{{cite web |last=Martin |first=R. A. |title=The Mysterious, Endangered River Sharks (''Glyphis spp.'') |publisher=ReefQuest Centre for Shark Research |url=http://www.elasmo-research.org/conservation/river_sharks.htm |access-date=10 December 2012}}</ref>

A typical requiem shark in its external appearance, it is stocky, with two spineless [[dorsal fin]]s and an [[anal fin]]. The first dorsal fin originates over the last third of the [[pectoral fin]]s, with a free rear tip that is well in front of the [[pelvic fin]]s. The second dorsal fin is relatively large, but much smaller than the first (about half the height). The anal fin is slightly smaller than the second dorsal fin and the pectoral fins are broad. A longitudinal upper precaudal pit is seen, but no interdorsal ridge. It is uniformly grey to brownish in color, with no discernible markings.<ref name=Compagno1997/>

Its snout is broadly rounded and much shorter than the width of its mouth. The mouth is long, broad, and extends back and up towards the eyes.<ref name=Compagno1997/>

Its eyes are minute, suggesting that it may be adapted to turbid water with poor visibility, such as occurs in the Ganges River and the [[Bay of Bengal]]. It has internal [[nictitating]] eyelids.<ref name=Compagno1997/>

The upper teeth have high, broad, serrated, triangular cusps and the labial furrows are very short. The lower front teeth have long, hooked, protruding cusps with unserrated cutting edges along the entire cusp, but without spear-like tips and with low cusplets on feet of crowns. The [[Shark tooth#Counting|tooth row counts]] are 32–37/31–34.<ref name="Compagno1984">{{cite journal |last=Compagno |first=L. J. V. |title=FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. |journal=FAO Fisheries Synopsis |year=1984 |volume=125 |issue=4/2 |pages=251–655 |url=http://www.fishbase.org/references/FBRefSummary.php?id=244&speccode=763 |access-date=6 December 2012}}</ref>

=== Diagnostic features ===
''G. gangeticus'' can be identified by the first few lower front teeth, which have cutting edges along entire cusp, giving the cusps a claw-like shape, and low cusplets. Also, a  second dorsal fin that is about half the height of first dorsal is distinct to this species.<ref name=MSIP>{{cite web |title=Glyphis gangeticus |publisher=Marine Species Identification Portal |url=http://species-identification.org/species.php?species_group=sharks&id=463 |access-date=6 December 2012}}</ref>