Pisulina

Pisulina is a genus of minute sea snails, marine gastropod mollusks, or micromollusks, in the family Pyramidellidae. These snails are ectoparasites. They are characterized by their small size, typically less than 5mm, and their parasitic lifestyle, feeding on other marine invertebrates. The shell morphology of Pisulina species is generally conical, often with subtle ornamentation. Species identification within the genus can be challenging due to the small size and subtle shell variations, often requiring examination of the animal's soft tissues or DNA analysis for accurate classification. The genus is found in various marine environments globally.