"… with polychaetes ... there is a huge variety of colors and shapes and behaviors. Some spend their entire lives swimming in the ocean like fish. Some are so big that they can actually catch and eat fish as big as a foot long. You've got ones that have feeding tentacles that look like spaghetti, and we call them spaghetti worms. We've got carnivores that eat meat. We've got herbivores that will only eat vegetation like and other types of . We've got ones that make tubes and amazing structures that they live in."