Epitonium ancillotoi is a lovely wentletrap with delicate varices known from Philippines to Australia, with vast majority of specimens originating from Philippines. A moderately comm.on carnivorous gastropod, it feeds exclusively on sea anemone like many epitoniids do. It inhabits sandy bottoms around the depth of -10-150m and is found closely associated with the sea anemone species which it feeds on, such as Heteractis crispa (Ehrenberg, 1834) and Macrodactyla doreensis (Quoy & Gaimard, 1833). It closely resembles Epitonium irregulare (Sowerby II, 1844) and often mistaken for it, but E. irregulare has smooth intervarical spaces lacking the dense fine spiral lines that characterise E. ancillottoi. The shell is most often uniformly white in colour, although some specimens carry irregular brown patches (as shown). Typical shell length around 30mm., very large specimens may exceed 40mm.

Balut Island, Davao Occidental, Philippines.