Question

Do fish get thirsty?

Answer 1

Fish:

1. A fish is a scaly-skinned animal that swims and breathes through its gills.
2. There are three different kinds of fish:

• Fish that live in freshwater
• Marine fish
• Seawater fish

1. Because water dilutes their blood and other physiological fluids, freshwater fish do not actively consume water.
2. It is well known that marine fish are hypertonic to seawater. In essence, they lose water to the ocean through their gills. Their blood has more salt than seawater. To replenish that water, they must ingest seawater.
3. Another hypothesis holds that fish don't need to drink water because they get all the nutrients they need from the ocean they live in.

Final answer: Fish shouldn't have to worry about becoming dehydrated because they can take in water via their skin and gills and live in water.