The New Guinea river shark, also know as the norther river shark, is the forth most endangered shark. This species is found in the tidal rivers and costal waters in northern Australia and Papua New Guinea. Since they are known as a river shark, they can travel from fresh water to salt water. New Guinea river sharks have a stocky grey body with a high back, small eyes, and broad fins. The can measure up to 8.2 feet long.
This species is very rare, only 9 have every been collected. New Guinea river sharks are endangered for several reasons. Since many of them are restricted to fresh water environments they are more susceptible to being caught in fisheries. Also habitat degradation is a major concern for this species. Since the population is already very small, possibly less then 250 species, their endangered status is very serious.