Lurker

Lurkers, also referred to as moving bumps, are objects found in the Sand Kingdom, the Snow Kingdom, and the Seaside Kingdom in Super Mario Odyssey. They are a glowing bump in the floor that can be defeated with a Ground Pound. Lurkers can be temporarily stunned by throwing Cappy at them. When defeated, a Power Moon appears. In total, there are three Lurkers.

Lurkers in the Sand Kingdom and in the Snow Kingdom are found in the boss battle arena after the boss was defeated. The one in the Seaside Kingdom is found in the sub-area underwater.

Related Power Moons
The following Power Moons can be obtained from Lurkers:
 * The Lurker Under the Stone
 * Squirming Under the Ice
 * Wriggling on the Sandy Bottom