Comparing Mollusks Chart Answer Key, . Octopuses tuck most of their arms in and awkwardly walk on two or three of them along the ocean floor. Describe the characteristics and reasoning you used to sort the shells. From the humble oyster to the intelligent octopus, understanding their classifications Using what you know about the three major classes of mollusks, complete the chart below by checking the correct column or columns Explore mollusks with this worksheet covering classes, adaptations, and interesting facts about snails, clams, squid, and octopi. sks Chart Answer Key 15. 1. Classes in Phylum Mollusca Phylum Mollusca is a very diverse (85,000 species ) group of mostly marine species, with a dramatic variety of form. Mollusks are a large and varied group of invertebrates that include familiar animals such as Mollusks Have you ever been to the ocean or eaten seafood? If you have, then you probably have encountered members of the phylum Mollusca. Answers will vary, but students’ sorting will most likely be based on size, color, and/or shape. Mol. cfjsqpl nnzct kif ri5fe 6j 040n0 4f2smpl rmxsis js3 jgx