Do fish feel thirst?

This is actually an interesting question because it involves the term "thirst," which is defined as a drive to drink water.Mammals exhibit this drive, and they drink as part of the physiological control mechanisms they use to maintain salt and water balance. Other key mechanisms in water and salt balance primarily involve the kidneys, which are regulated largely by hormones. Animals that live on land face a constant threat of dehydration, and thirst provides a drive that helps maintain salt and water balance through drinking water.

Fish, on the other hand, live in water. The question sometimes arises about whether or not fish drink. The answer is that they do; at least, many teleost fishes do. Fish that live in fresh water have blood with a higher concentration of salt and other solutes than the surrounding water. Because their gills are in constant contact with the water, fresh water fish face a constant threat of their blood diluted, so they don't use drinking as a mechanism to maintain the high solute concentration in their blood. Fish that live in salt water, however, have blood with a lower solute concentration than their surroundings and, like terrestrial animals, face a threat of dehydration.

Salt water teleost fish do drink to help maintain salt & water balance in their blood. They differ from terrestrial animals, however, in two respects. First, they don't have to search for water; since they're surrounded by water, they drink very frequently. Second, the neural circuits that control drinking are different in fish and mammals. In fish, these circuits are located in the hindbrain, but in mammals they are in the forebrain. Drinking in fish is considered to be a reflex and is thought to occur without any thirst arousal. Thus, although fish drink, that doesn't necessarily mean that they get thirsty! Current thinking suggests that they don't.

- Dr. Joffre Mercier, Professor of Biology at Brock University

This information was taken from Quora. Click here to view the original post.

Have you ever thought about it? Do you find the fact that fish do drink water surprising?

#Science #animals #Quora


What are your thoughts on this subject?
tdelisi, from what I can remember from my Bio classes at Uni, fish is plural if you were talking about one species like look at all the fish (if it is a bowl of multiple goldfish) but with multiple species then it was to be fishes. But again it has become acceptable to use fish as a plural in that instance also since so many just knew that the word fish could also be plural. So fishes in this context is perfectly fine.
Sep 4, 2021 6:54PM
Bob Campbell
tdelisi, “Fishes” is acceptable in the context in which it was used, according to
Nov 21, 2020 9:02PM
Did the writer use “fishes”????
Jan 9, 2020 9:08PM
All Mom Creatures feel.
Nov 22, 2019 10:04PM
Allan Dowton
The answer is NO, They absorb all the water they need through their gills!
Nov 17, 2019 9:27PM
Not surprised
Jun 9, 2019 5:10AM
Peter de Loriol
V interesting
Apr 18, 2019 4:26PM
Irma Rivera
I learned something new today!!!
Mar 28, 2019 5:06PM
Linalinda Eichin
Great information
Mar 14, 2019 5:21AM
Karyn Mauro Rexelle
I have actually thought about this.
Mar 3, 2019 11:42PM
Chriss Crockford
Good information.
Feb 25, 2019 4:48PM
Thank you for that very educational trivia! Good job Dr. Joffre Mercier!
Jan 2, 2019 4:31PM
Claire Cowlin
We all need water to survive
Dec 30, 2018 6:17AM
vasily tchaikovsky
good information,thanks, never think about this
Dec 1, 2018 2:41PM
This is an example of "ivory tower" writer. What is a "teleost" fish as opposed (supposedly, pun intended) to non-teleost fish?
Oct 22, 2018 10:36AM

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