Sharks are facing dwindling numbers worldwide.
Read up on this list of vanishing shark species most at risk.
1. Ganges Shark
Remaining individuals from this stocky freshwater species are believed to be confined to turbid waters of the Ganges-Hooghly river system.
2. Pondicherry Shark
This black-tipped gray and white shark from the Indo-West Pacific Ocean has not been reported since 1979, and is only known from 20 older museum specimens.
3. Bizant River Shark
Glyphis sp. nov. A
A scientifically undescribed species, Australia’s Bizant River shark appears to be succumbing to habitat degradation and fishing pressures, since the population likely consists of less than 250 mature individuals.
4. New Guinea River Shark
Glyphis sp. nov. C
Only nine individuals of this slender, flat-headed, scientifically undescribed species have ever been collected. It is now believed that fewer than 250 mature New Guinea River sharks exist.
5. Angel Shark
Once a common predator throughout its Northeast Atlantic, Mediterranean and Black Sea domains, the angel shark has now been declared extinct in many regions, primarily due to fishery bycatch problems.
6. Striped Dogfish
Close to extinction in Brazilian waters, the striped dogfish is also in decline over the rest of its range in the Southwest Atlantic.
7. Daggernose Shark
The low birth rate for this species has made it vulnerable to fishing pressures in its limited northern South America coastal water range.
8. Dumb Gulper Shark
Fishery trawl surveys in recent decades have shown that this species has experienced a population decline of over 99 percent.
9. Whitefin Topeshark
The Philippine coastal range of the whitefin topeshark is now heavily fished and environmentally degraded.
10. Borneo Shark
Very little is known about this small coastal shark, which may be even more endangered than current reports suggest.
11. Speartooth Shark
Development, overfishing, habitat destruction and other factors have caused the population of this Papua-New Guinea and northern Australia species to dangerously decline.
12. Sawback Angelshark
This Iberian Peninsula species is reported so infrequently that information about it remains scarce.
13. Smoothback Angelshark
Slow reproduction and maturation hinders recovery from fishing pressures on this bottom dweller.
14. Narrownose Smoothhound
Overfishing within the South American range of the narrownose smoothhound has led to declines of up to 85 percent in some areas.
15. Argentine Angelshark
With a breeding cycle only every two years, this shark is extremely vulnerable to depletions due to trawl and gillnet fishing within its range.
16. Flapnose Houndshark
A restricted range off the coast of South Africa and low birth rates impede recovery from fishing pressures and habitat degradation.
17. Sharpfin Houndshark
This shark has not been reported since 1968, when a few specimens were captured near Ecuador.
18. Smoothtooth Blacktip
A small population is believed to exist in the North Indian Ocean, but this species is only known based on a single specimen from the Gulf of Aden.
19. Bluegray Carpetshark
Subject to intense fishing pressures, this Queensland, Australia shark is only known to conservationists based on less than 20 specimens.
20. Southern Sawtail Catshark
This small shark often is captured as bycatch in squid fisheries located near its Brazilian range.
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