What is hippos yawn?

Hippos yawn for a variety of reasons. It is often thought that they yawn because they are tired or bored, but this is not always the case. Hippos may yawn as a form of communication, to show aggression or submission to other hippos. They may also yawn to display their large tusks or to cool themselves down, as yawns can bring in large amounts of air and help to regulate body temperature. Additionally, hippos may yawn to stretch their jaw muscles or to release tension in their bodies. Despite their reputation for being lazy animals, hippos are actually very active and can be quite aggressive, making their yawns an important part of their communication and behavior.