Are salt water gills different from fresh water gills?

Yes, saltwater gills are different from freshwater gills due to the distinct environments in which they function. Saltwater Fish have gills adapted to excrete excess salt, as they live in a hypertonic environment where water tends to leave their bodies. In contrast, Freshwater Fish gills are designed to absorb salts and retain water, as they inhabit a hypotonic environment where water naturally enters their bodies. These adaptations ensure that each type of fish can maintain proper osmotic balance in their respective habitats.