What sea dwellers hang upside down and kick food into their mouths?

The sea dwellers that hang upside down and kick food into their mouths are called upside-down jellyfish, specifically those from the genus Mastigias. They have a unique feeding mechanism where they use their tentacles to capture plankton and other small organisms, and they often position themselves upside down on the seafloor. Their bell-shaped bodies float with the tentacles facing upwards, allowing them to effectively filter food from the water. This behavior is a fascinating adaptation to their environment.