Most living animals have lungs. Fish have gills, which allow them to breathe. There may be other sea creatures that do not have lungs as well. Also, some creatures breath through their skin - such as worms, which do not have lungs.
Whales have lungs. They descended from land animals with lungs. They had lungs before they became creatures living full time in the ocean. They did not develop either gills or lungs after they became sea creatures but long before.
they actuly all have lungs but fish gave gills
Sea cows are mammals, and breath with lungs.
A sea otter is a mammal, so it has lungs.
Lungs do not differ that much in domestic animals. These animals need oxygen just like the animals that are in the wild.
Sea animals live anywhere in the SEA.
Fish
All of them.
All mammals breathe with lungs.
sea animals usually have gills and can only be underwater and if on land will die, Land animals do not have gills and were ment for the land if they go in water for to long they will die to. Provided by Barto
Sharks are sea animals. Salmon are sea animals.