- Up to 73 million sharks are killed every year in support of the global shark fin industry.
- 926,645 square miles (2.4 million square kilometers) of the ocean is off limits to shark fishing.
- Losing sharks could have consequences that affect the entire ocean ecosystem.
- Bull Sharks are the only shark species that frequent freshwater, and can remain for long periods of time.
- Osmoregulation is the process that allows sharks to cellularly adapt their body fluids to cope with their environment.
- Bull Sharks can tolerate hypersaline water as high as 53 parts per thousand.
- 90% of a shark’s body secretion into the water is done by the gills, in order to balance internal pH.
- The spiral valve intestine in sharks increases the surface area of digestion and conserves space within the body.
- Some sharks will consume other sharks for food.
- 80% of the 350 shark species grow to less than 5 feet are unable to hurt people and rarely encounter them.
- Adult bull sharks are not known to have any natural predators, except humans.
- The largest bull shark caught on rod and reel weighed 771 lb. 9 oz.
- Humans are more at risk to die from a dog attack then a shark attack.
- Bull Sharks get their name from having a blunt, round snout, and robust-body, which is used to head-butt their prey before biting.
- Bull sharks can live up to 16 years.
May 23, 2013
River Shark Facts