By request - Shark's fin spotted in Eramosa River?
Hope you find this image really jawsome!
Hmmm! Must be a bull shark, since this species is often found in brackish water — and even freshwater rivers.
In fact, they have been spotted 2,500 miles up the Amazon River and in Lake Nicaragua, a freshwater lake in Central America. They have traveled up the Mississippi River as far north as Illinois and are regularly spotted in India's Ganges.
Their ability to tolerate freshwater is rooted in salt retention.
Sharks must retain salt inside their bodies. Without it, their cells will rupture and cause bloating and death. Given this requirement, most sharks cannot enter fresh water, because their internal salt levels would become diluted.
But bull sharks have special physiological adaptations that enable them to live in fresh water. Their kidneys recycle the salt within their bodies and special glands, located near their tails, also aid in salt retention.
Bull Shark Threat: They Swim Where We Swim!
Q: What should you do if you see a shark?
A: Swim far, far away!
By request - Shark's fin spotted in Eramosa River?
Hope you find this image really jawsome!
Hmmm! Must be a bull shark, since this species is often found in brackish water — and even freshwater rivers.
In fact, they have been spotted 2,500 miles up the Amazon River and in Lake Nicaragua, a freshwater lake in Central America. They have traveled up the Mississippi River as far north as Illinois and are regularly spotted in India's Ganges.
Their ability to tolerate freshwater is rooted in salt retention.
Sharks must retain salt inside their bodies. Without it, their cells will rupture and cause bloating and death. Given this requirement, most sharks cannot enter fresh water, because their internal salt levels would become diluted.
But bull sharks have special physiological adaptations that enable them to live in fresh water. Their kidneys recycle the salt within their bodies and special glands, located near their tails, also aid in salt retention.
Bull Shark Threat: They Swim Where We Swim!
Q: What should you do if you see a shark?
A: Swim far, far away!