sentence: Hippos have big and heavy bodies, dark gray skin, and short legs.
sentences_after: A hippo's main defence is their extremely strong mouth. Hippos are actually strong enough to break an alligator in half with one bite, but they are usually not violent unless something attacks their babies. They can grow to be 15 feet long and weigh 3,000 pounds.
concept_name: hippos
headings: Hippopotamus Description
categories: Even-toed ungulates