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Do fish drink? – Decorative Ponds & Water Gardens Q & A


 Do fish drink?

Do fish drink? Kristie – Doglap, MS

You would think that your koi need a drink of water like the desert needs another grain of sand but just like us; they too need a little refreshment from time to time. Koi utilize water to maintain proper body functions the same as us but they just do it a little bit differently.

Koi don’t per say “drink” like we do. If we want a glass of water, we pour water in a glass and drink away through our mouths. Koi on the other hand absorb water through their gills and body in a process called osmosis. Osmosis is defined by dictionary.com as “the tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane.“ In other words, koi have larger concentrations of water that contain salt in their body than does the surrounding water garden. Through osmosis water is constantly passing through koi’s semipermeable skin into their body to equalize these concentrations. Since water is constantly absorbing into their bodies they have to immediately excrete this water to prevent them from bursting. During the course of a day, they can excrete up to 10 times their weight.

Feed your fish with the best!

2 Responses

  1. I am wondering why one of my little goldfish jumped out of my small pond during the night or wee hours of the morning. I discovered it laying on the ground about a foot from the pond. There were no animal tracks and no sign the fish had been attacked or partly eaten. Is there any safe way to prevent fish from jumping out of decorative ponds?

    • Hi Jan,

      Is there only one fish that is doing this? If this was a one time deal there are many reasons it could have jumped up. They will try to reach or food or just be playing around and miscalculate the landing. If it becomes a common occurance you may want to test your water. When fish start to jump many times they are trying to escape an issue within their environment. The only preventative method to physically stopping them from jumping out is to put a net over the pond but if this is a one time deal I would not worry. You may want to add some Pond & Fish Conditioner to the pond though to aid in any scrapes or brusies the fish may have encountered.

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