caption: The image shows a group of five small shells, known as lymnaea stagnalis, sitting on top of a table next to a piece of paper with some text written on it. The shells are a light brown color and have a smooth, glossy texture. They are arranged in a triangular formation, with the largest shell in the center and two smaller shells on either side. The text on the paper is written in black ink and is likely a description of the shells.