What is a group of manta rays called?

A group of manta rays is called a "fever" or a "manta ray train." Manta rays are large, graceful creatures that belong to the same family as sharks. They are known for their distinctive triangular shape, wing-like pectoral fins, and wide mouths. Manta rays are found in tropical and subtropical waters around the world and are often seen in groups feeding on plankton-rich waters. They are known for their acrobatic flips and somersaults, making them a popular attraction for divers and snorkelers. Manta rays are gentle creatures and are not known to be aggressive towards humans.