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Only 43 species of elasmobranch in ten genera and four families have been reported to enter fresh water, of which the bull shark is the best known. Other species that enter rivers include the stingrays (Dasyatidae,Potamotrygonidae and others) and sawfish (Pristidae). Some skates (Rajidae), smooth dogfishes (Triakidae), and sandbar sharks (Carcharhinus plumbeus) regularly enter estuaries. The ability of elasmobranchs to enter fresh water is limited because their blood is normally at least as salty (in terms of osmotic strength) as seawater, through the accumulation of urea and trimethylamine oxide, but bull sharks living in fresh water reduce the concentration of these solutes by up to 50%. Even so, bull sharks living in fresh water need to produce twenty times more urine than those in salt water.[5] Initially, scientists thought the sharks in Lake Nicaragua belonged to an endemic species, the Lake Nicaragua shark (Carcharhinus nicaraguensis). In 1961, following comparisons of specimens, the Lake Nicaragua shark was synonymized with the bull shark.[12] It had been presumed that the sharks were trapped within the lake, but this was found to be incorrect in the late 1960s, when it was discovered that they were able to jump along the rapids of the San Juan River (which connects Lake Nicaragua and the Caribbean Sea), almost like salmon.[13] As evidence of these movements, bull sharks tagged inside the lake have later been caught in the open ocean (and vice versa), with some taking as little as 7-11 days to complete the journey.[12] Bull sharks have been caught approximately 900 miles up the Mississippi River, and have been observed approximately 2,500 miles up the Amazon River.[14]
This information is quoted from www.wikipedia.org, I did not write anything of this not did I personally gather the accumulative information to come to these scientific conclusions, i hereby do not take credit for this information, if you wish to know more about bull sharks, please visit wikipedia.org, its usually a good place for information, especially in biology. Thank you:)
What else can I help you with?
Which shark is the only shark that can swim in salt and fresh water?
The bull shark.
Which shark can swim in salt and fresh water and has been found in the Mississippi?
bull sharks.
Is it quicker to swim in salt water or fresh water?
Salt water has a slightly higher density, so it will be a little quicker to swim in fresh water.
Do pirnahas swim in salt water or fresh waater?
salt water
What water does a clown fish swim in salt or fresh?
They live in salt water They live in salt water
Fossil dinosaur that can only swim in fresh water?
bull shark
What shark can swim in fresh water and slat water?
A bull shark can adapt to any water tempura or type of water good luck
Can salt water crocs swim in fresh water?
for a simple answer,Yes
Why is it easier to swim in sea water then in fresh water?
Because there is salt in sea water and salt makes you float better so is easier to swim.
Why is it easier to swim in seawater then it is to swim in fresh water?
probally fresh because no salt in mouth or eyes addition: it is easier to float/swim in seawater since seawater is denser than fresh water.
Do bull sharks live in the ganges?
No. The Bull Sharks are known to swim up the Ganges River and hence sometimes they are confused with the Ganges River Shark. The Ganges Shark is a fresh water shark that is indigeneous to the Ganges river of India. They are a critically endangered species. Whereas, the Bull sharks can live in both salt and fresh water.
Can tiger sharks go in freshwater?
Yes, Tiger Sharks CAN swim in fresh water. Tiger Sharks reside in oceans; however, they are sometimes willing to go into fresh water to catch their prey.
