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Just like in your fish tank you have to clean it out so when you do you either do that often so you can get air in the water or you haves bubbler so in the ocean it has rivers making bubbles constantly or even the rain will do it

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Q: Where does the oxygen come from for the fish?
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Related questions

Why do fish-?

fish swim for oxygen.


Do tadpoles get oxygen from the air or from the water like fish?

Tadpoles get oxygen from water like fish do.


How is the oxygen taken in by the lungs of mammals different from the oxygen taken in by the gills of a fish?

Mammal take in oxygen in the air while fish take in oxygen in the water.


How do fish take in oxygen?

The fishes gills are like filters. when water goes in a fish's mouth, it goes through the gills, which filter out the oxygen.


Floran fish need the oxygen?

Floran fish need oxygen other wise it will death . so always need oxygen


Do puffer fish need oxygen?

Of course all fish need oxygen even puffer fish....


What is a fish areator?

A fish AERATOR is a device used to add oxygen into a fish tank so that the fish do not suffocate as they consume the increasingly depleted oxygen supply


How does a shark obtain oxygen?

Sharks are a fish. Fish have gills that extract oxygen directly from the water in which they live.


Do fish supply oxygen to snails?

no, Fish like all animals breathe in Oxygen and out Carbon Dioxide.


Do baby molly fish need oxygen?

All fish, whether baby or older, need oxygen.


What carries oxygen to all the cells in a fish?

Gills carry oxygen fish need directly from the water


What type of fish doesnt need oxygen?

All fish need oxygen....