An orange coral with many branches. This is a new emoji belongs to Emoji 14.0 which released in September 2021.
🪸 generally means coral, can also be used in topic related to sea
🌊, diving, aquarium, marine organisms, coral bleaching or coral decorations. Related emojis:
🤿🐠🐬🦈🐋 💡: The corals🪸 actually are a kind of marine animal, but they are often mistaken for plants
🌲 because look like tree branches.