Invertebrates are creatures without backbones. They are the most abundant creatures on earth, crawling, flying, floating, or swimming in virtually all of Earth’s habitats. About 99% of all living species are invertebrates. The word “invertebrate” derives from a prefixed form of the Latin word vertebra which means a joint in general and more specifically a joint from the spinal column of a vertebrate. Coupled with the prefix in-, meaning “not” or “without”, the word conveys the meaning: “those that lack vertebrae”. In this category you will find the invertebrates at the Aquarium.