Euphyllia cristata" Joker" coral, is a popular species of LPS (large polyp stony) coral in the reef aquarium hobby.

Characterized by its vibrant colors and unique branching structure, it features both smooth and branching polyps, which can host a variety of hues, often showcasing bright green and purple shades.

Regular feeding and placement in appropriate areas within the aquarium can enhance its growth and coloration, making it a stunning centerpiece in reef tanks.