Roccellina is a genus of small, colorful sea slugs, commonly known as nudibranchs. These marine gastropods are found in warm, shallow waters around the world. They are known for their vibrant colors and unique shapes, which help them blend into their surroundings and avoid predators. Roccellina species primarily feed on sponges, which are their main source of nutrition. They possess specialized adaptations that allow them to consume these organisms effectively. Like other nudibranchs, Roccellina has a soft body and lacks a protective shell, making them more vulnerable but also more agile in their aquatic environment.