Care of Fish
How much water can fish drink?
Do sea fish and sea mammals drink sea water and if they do how do they eliminate Sodium?
Fresh water fish do not drink water, they absorbed it through their skin, like osmosis. Sea water fish do drink water, and excrete the salt through their gills. The salmon, which lives in both in environments, gets its water like a fresh water fish when in fresh water and like a sea water fish when in the sea.
Asked in Alcoholism
Can fish drink alcohol?
Asked in Fish, Freshwater Fish, Saltwater Fish
Do fish drink water?
Fresh water fish absorb water through their skin and gills, saltwater fish actually do drink water. In saltwater fish, they have to drink because their body's concentration of salt is lower than the surrounding water. Therefore, they have to drink huge amounts of water every day to stay hydrated. In freshwater fish, their salt concentration is higher than that of the surrounding water, and, as osmosis dictates, they absorb water through their highly permeable skin. To keep from bursting, freshwater fish actually have to excrete water, up to 10 times their body weight daily, unlike saltwater fish.