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no there are also freshwater sharks
Not long unless they are freshwater sharks
the paroon shark is salt water or freshwater?
There are requiem sharks that inhabit brackish and freshwater rivers. These sharks have, thus far, only been found in rivers in South and Southeast Asia and Australia. The only other shark known to be found in rivers is the Bull Shark which has the ability to inhabit both saltwater and freshwater.
No the salmon and bull and sometimes the blue shark swim in freshwater sometimes.
There are some sharks that can live in freshwater environments, but there aren't a lot that can cross over and live in both. The Bull shark is one that has been shown to have the ability to live in both saltwater and freshwater. Interestingly, they have to produce 20 times more urine when living in freshwater. (See the related link for more about Bull Sharks' freshwater tolerance.)
salt water sharks typically do not go into fresh water, but sometimes they do. some sharks have been in freshwater for so ling that they have adapted and become freshwater charks. though this is uncommon, it does happen
i am not sure about eating sharks but i have had a few eat each other.
No. They are freshwater fish only.
Rainbow Sharks, which are freshwater fish, not real sharks, ARE egg layers, but rearly breed in captivity.
No. Minnows are bony fish, and sharks are Elasmobranchs.
You will not find the usual sharks in Lake Tahoe. However, there could be bull sharks in there because they can survive in fresh water, and they have been known to attack.