Sea Bones

This book talks about all types of animals that live in the sea, like sharks, and whales, and jellies, and all sorts of other things. But, it is talking about whether they have bones or not, or what type of skeletons they have. Some have an exoskeleton, which is an outside skeleton, and some have an endoskeleton, which is something inside you. Crabs and lobsters have exoskeletons. Some animals that don’t have any bones are jellies and octopuses, and some that have skeletons inside are seals, and whales, and fish. Sharks have endoskeletons, too, but their skeletons are made of cartilage instead of bone. I don’t know why their bones are soft; that is something I want to find out! Turtles have endoskeletons, too, but they have a shell which is a bone that is like an exoskeleton, so it is like they have an exoskeleton and an endoskeleton. There is a surprise at the end of the book, too! The pictures are made by cutting out the shapes and gluing them on top of each other, and they are colorful and fun. This is a very exciting and fun book to learn about bones in the sea!