Lotoria lotoria, common name the black-spotted snail or washing bath triton, is a species of predatory sea snail, a tropical marine gastropod mollusc in the family Cymatiidae.

[2] Fossils from this family date back to the Eocene (age range: from 55.8 to 0.012 million years ago).

[4][5] The shell is somewhat fusiformly turreted, thick, solid, distorted at the lower part, with four or five varices.

The shell is reddish yellow, ornamented above the aperture and upon the varices between the ribs with blackish brown.

[6] This species of marine snail lives in the tropical Indo-Pacific oceans,[5][7] the Philippines, Papua New Guinea, the Marquesas Islands and off Australia (Queensland) Lotoria lotoria is quite common in coral reefs in Australia and the Indian Ocean.