Are there any animals that can live underwater and live on land? i'm not talking about animals that can breathe a long time underwater but animals that can stay on land as long as they want and stay underwater as long as they want.

hmm.. Animals that can survive in land and aquatic environments typically still have a preferred habitat. For example alligators are primarily found in water but they also spend time on land and can hunt on land. Amphibians (ex. tadpoles to frogs) usually begin their lives in water but develop terrestrial adaptations as they grow. Amphibians may be semiaquatic and comfortably switch from land to water terrains. The European pond turtle can live on both land and water. Hopefully this answered your question :)

Explanation:

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above