Fish get thirsty too

Fish -particularly seawater fish- are constantly threatened by dehydration due to the salt concentration in their blood being lower than the water they are surrounded by (seawater is highly saline) so they actively drink water.

Can we then say that they get thirsty? Well, they do but not like land mammals who feel the need to seek water in order to stay hydrated; since they live in it, fish don’t really feel that urge and don’t have to “feel thirst” to drink water.

fred

Savant

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