Aulactinia verrucosa, the gem anemone (family Actiniidae), is a small, brightly colored sea anemone found in the northeastern Atlantic Ocean and Mediterranean Sea, inhabiting rocky subtidal environments in well-lit, current-swept areas. It is recognized by its verrucose (warty) column and colorful tentacles arranged in multiple whorls, and relies entirely on heterotrophic feeding without photosymbionts. It is occasionally maintained in marine aquaria and is a subject of research into cnidarian toxins and intertidal community ecology. Genomic data have been generated for this species and are available in public databases, enabling comparative studies of cnidarian evolution and ecology.