Fresh water animals.
It's because reefs are built by salt water animals.
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salt water or fresh water
A clue is in their name - sea turtle - sea is salt water.
The fundamental difference is the salinity, hence the name. With a greater salt content, water has the following effects.Density differenceYou can float better in salt waterDifferent plant and animals grow in salt or fresh water.Salt water can not be safely consumed by most land animals.
Fresh and salt water are very different for one key reason, fresh water doesn't contain salt and salt water obviously does. There are different flora and fauna in fresh and salt water for this reason.
lamprey are both salt and fresh water fish they live in fresh water for 4-5 years then they go to sea and stick to fish for 4-5 years then head back to fresh water spawn and die.
on fresh salt water
Salt water is water that has salt in it and it is found in oceans. Fresh water does not have salt and is found in rivers and lakes.
there is salt in salt water and little salt in fresh water
Quick and Dirty: Brackish.
Some can live in both.