Fire Anemon

Actinodendron arboreum, commonly known as tree anemone or hell’s fire anemone, is a species of sea anemone in the family Actinodendronidae. It is native to the Indo-Pacific where it grows at depths of down to 28 metres (92 ft). Most sea anemone species are harmless to humans, but A. arboreum is highly venomous and its sting can cause severe skin ulcers (as also suggested by its alternative name, hell’s fire anemone).