Dolphins peguins and sharks are distantly-related species that share similar characteristics which help them live in water this is an example of?

Answer 1

It's called convergent evolution

Answer 2

Convergent evolution, where unrelated species develop similar traits in response to similar environmental challenges, like living in water. Dolphins, penguins, and sharks have adapted to their aquatic habitats by evolving features such as streamlined bodies, fins, and blubber, despite not sharing a recent common ancestor.