Do fish need oxygen?


Fish need oxygen, but since they do not have lungs they get their oxygen from the water they live in. The oxygen in the water that fishes use is called dissolved oxygen, since the oxygen is dissolved in water.

Fishes use their gills to get oxygen from the water in a way similar to the way humans use their lungs to get oxygen from the air. Air has 21 percent oxygen, while oxygen in water is a rare resource. Fish only need a tiny amount of dissolved oxygen. They are able to live well if the dissolved oxygen is at least five parts per million. If the dissolved oxygen is less than two parts per million, most fish will eventually suffocate and die.

Q&A Related to "Do fish need oxygen?"
They have evolved a sort of pumping system. First they gulp water(which contains around 5ml of oxygen per liter) in by opening and closing their mouths. Then, with the help of their
Yes, they do. Using their gills, they extract oxygen from the water they "breathe" in.
While people breath oxygen from the surrounding air, fish are able to process oxygen from the water. Water, or H2O, is made up of both hydrogen and oxygen. However, fish cannot separate
Fish do 'breathe' water. They take water in through their mouths and push it out through their gills. The gills effectively remove the oxygen that is 'dissolved' in the water. Just
Explore this Topic
Fish get oxygen from a process called aeration. This is a process that happens when the water is stirred by stream or waves, this mixes oxygen in with the water ...
Goldfish require a lot of oxygen. A goldfish can even survive lower temperatures provided there is sufficient supply of oxygen in the water. Since water surface ...
We need oxygen because the main use of oxygen in humans and aerobic organisms is to permit the body to build energy. Energy is required as a host of processes ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014