Euprotomus bulla, common name : the Bubble Conch, is a species of sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs.
The shell size varies between 48 mm and 90 mm. The shell of the snail is almost elliptical, with a rough dorsal surface, and tubercles on its shoulders. Outside, the shell is a "glossy cream" color, with fawn mottlings and spiral bands of gray appearing in mature specimens. The inside of the shell is aperture bright pink or orange.
This species is distributed in the Pacific Ocean along Indonesia, the Ryukyus (Japan) and Samoa.
Known from depths around 500 feet, via tangle nets.