Aspect: Stout tubular body the upper edges from which translucent orange ball-tipped tentacles extend to give the appearance of a fireworks. Population: Occasional. Notable feature: More usually visible at night. Protruding mouth can be seen in the centre of the relatively flat oral disk, which differientiates it from the anemone. Environment: Usually on rock and coral boulders. Behaviour: Will promptly retract if disturbed.