👉 Exochaenium is a type of marine shellfish that is commonly found in the Pacific Ocean, particularly in areas such as Japan, Korea, and Taiwan. These mollusks are known for their unique, octagonal shape and are often associated with the sea otter (Ursus maritimus). They have a crustose skeleton and are capable of diving up to 15 feet deep into the ocean. Exochaenium is primarily consumed by marine mammals such as whales, dolphins