Freshwater fish lose salt from their bodies because the surrounding water is less salty than their internal fluids. They actively take in salts through their gills and excrete dilute urine to maintain their internal salt balance.

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Freshwater Fish

Question 5

Multiple Choice

Freshwater fish

A) lose water from their bodies.
B) Lose salt from their bodies.
C) must keep the salt concentration of their bodies lower than that of freshwater.
D) must keep the salt concentration of their bodies equal to that of freshwater.
E) must drink water to maintain dilute body fluids.

Correct Answer: