Question

What structure insea fishes helps them counter the salinity of water

Answer 1

Explanation:

1. Water naturally seeks a chemical balance, or equilibrium. That means water flows from areas of higher water concentration to areas of lower water concentration to equalize the system. Water concentration inside a fish is higher than in the ocean itself because the ocean is so salty. As a result, most saltwater fish constantly lose water through their gills and skin.

2. Because the fish is losing water, it must drink a lot to stay hydrated-but salty seawater is the only water around.

3. To get rid of excess salt, the fish's kidneys pump lots of salt into its urine.