A student in my class once asked,
do fish ever get thirsty? I was 15 at the time, and I remember my science teacher struggling to answer the question.
Here's the best possible answer I can give you -- it all depends whether the fish is a
saltwater fish or a
freshwater fish.
Click the image for more details
Notice how the fresh water fish actually obtains H
2O via the food it consumes, not through drinking. Whereas the saltwater fish actually drinks the water can hence has highly concentrated urine.
