Invertebrates are animals without a vertebral column, but they are not one uniform group. This overview explains their major phyla, body structures, habitats, life cycles, ecological roles, and familiar examples—from insects and earthworms to corals and octopuses.
Conservation Efforts
When nature is threatened and ecosystems are crumbling under increasing stress, it may seem as if hopelessness is the only way for endangered species – but there are encouraging conservation success stories out there to prove it isn’t all doom and gloom.