sentence: Dolphins use echolocation to find their food.
sentences_before: Dolphins breathe air. A dolphin's nose is on top of its head so the dolphin can easily breathe on the surface of the water. The skin of a dolphin has no scales. It is soft and smooth. However, it is very firm, due to how much muscle they have.
concept_name: dolphin
headings: Dolphin
categories: Toothed whales