Fat-Tentacled Torch Coral

Euphyllia cristata

Euphyllia cristata, known as the Fat-tentacled Torch Coral, is a stony coral belonging to the family Euphylliidae. It is characterized by its large tubular tentacles with knob-like tips, typically displaying pale green or gray hues. The coral forms small phaceloid colonies with elongate, tube-like corallites that can reach diameters between 20 and 40 millimeters. Divers can identify this species by its distinctive appearance and the absence of columellae in its structure. This coral inhabits the tropical waters of the Indo-West Pacific, with a significant presence in Indonesia. It is found in a variety of reef-associated habitats, including coral reefs, reef slopes, and reef flats, at depths ranging from 1 to 35 meters. Despite its wide distribution, E. cristata is considered uncommon compared to other species in its genus. The coral thrives on hard substrates and is typically found in shallower waters, with 90% of occurrences recorded at depths shallower than 20 meters. E. cristata faces several threats, including ocean acidification, pollution, and changes in water temperature, which increase its susceptibility to bleaching and disease. Its conservation status was assessed as Vulnerable by the IUCN in 2008, although a more recent assessment in 2023 listed it as Least Concern. Divers encountering this coral should be mindful of its delicate nature and the environmental pressures it faces.