Habitats
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Amount of salt<br />
Some fish cannot live in water with lots of salt and some<br />
need salt to survive.<br />
There are 3 types of underwater environment with<br />
different levels of salt:<br />
Freshwater: Water which contains very little salt. Most<br />
ponds, lakes and rivers are freshwater.<br />
Saltwater: All of the world’s oceans and seas have high<br />
levels of salt.<br />
Brackish water: Brackish water exists where freshwater<br />
rivers meet saltwater seas. The levels of salt change all<br />
the time.
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