caption: The image shows a close up of a sea slug on the sand, with a scale and text at the bottom. The sea slug is small and has a black and white striped pattern on its body. Its antennae are long and thin, and its legs are short and stubby. Its eyes are large and round, and it has two small antennae on its head. Its body is covered in small bumps and ridges, giving it a bumpy texture.