Width to 14 cm, 10 cm high. Bell surface covered with stinging warts. Up to nine tentacles on each corner, on stout, hand-like structures. Finger-shaped gastric saccules, 1/2 length of bell cavity or shorter. Rhopalial pits about 1/6 up from bell edge. Habitat: occasionally inshore. Distribution: pantropical. Sting may be life-threatening (Richmond, 1997).