Fish use gills, which extracts oxygen from the water.
Amphibians and whales breath oxygen, whales can hold their breath for hours at a time, explaining how sperm whales can hunt at great depths for periods of time.
What do river otters need to survive?
They need to have food (they prefer fish and crayfish, but eat what is available), water, and a good large habitat. river otters often die from pollution and/or loss of habitat. ...
Asked in Piranhas
Organisms that help the piranha survive in its habitat?
caminals watersnakes turtels and otters
Asked in Otters
What features does an otter have to survive in water?
Otters have very soft, insulated underfur, which is protected by an outer layer of long guard hairs. This traps a layer of air which keeps them dry and warm under water. ...