What is "olivellidae"

Olivellidae, common name the "dwarf olives", are a family of small predatory sea snails with smooth, shiny, elongated oval-shaped shells. The shells sometimes show muted but attractive colors, and may have some patterning.

These animals are marine gastropod molluscs in the superfamily Olivoidea, within the clade Neogastropoda according to the taxonomy of Bouchet and Rocroi.