Pusillina and Rissoa species are the most numerous molluscs in many habitats and an important food source for fish and birds (Warén, 1996). Recently hatched Buccinum undatum were found on filamentous red algae with P. inconspicua in Wales and, in captivity, predating on them.

Recently hatched Buccinum undatum, found on filamentous red algae with P. inconspicua. In captivity the Buccinum predated on the P. inconspicua. H. 1.8 – 3.9 mm, Llŷn Peninsula, Wales, March 2015.