I'm not looking this one up, this is from memory so here goes.
Fish generally use gills to get their oxygen and this works by oxygenated water (H2O + extra Os) passing through the fine gill filaments that absorb oxygen from the water supply.
it depends on the fish.
you need oxygen to survive anywhere.. most definately on saturn!!
Fish need oxygen to live.
They both need oxygen to survive.
Most fish need oxygen from water to survive. However, there are a few exceptions such as the lungfish, which has adapted to breathe air directly from the atmosphere in addition to using gills to extract oxygen from water.
Fish need clean water, appropriate temperature, oxygen, proper nutrition, and space to swim in order to survive in a tank.
They need water Fish can not process oxygen the same way mammels do. They get their oxygen throu molecules in the water.
No, fish cannot survive in milk as it does not provide the necessary oxygen and nutrients for them to live. Fish need water to breathe and milk would not be a suitable environment for them to survive.
Oxygen
Fish extract oxygen from water using gills, but gills cannot extract oxygen from air. A few species of fish (e.g. lungfish, snakehead) have some ability to extract oxygen from air (e.g. lungfish use a modified swim bladder like a lung) and can survive short trips across dry land from one shallow pool to another.
Fish do not breath air, they do not have lungs like humans or most other land animals.They use gills to take oxygen from water.If you take a fish out of the water it will suffocate and die from oxygen starvation.
They need oxygen definitely to survive. They get this from filtration through their gills. As far as light is concerned, they do not need light to survive as many live below the layer in the ocean that light can permeate. There are fish that lice in total darkness. They have adapted over the years to exist in these conditions.