Over 96% of all the animal species on Earth are invertebrates! But what is an invertebrate?
Invertebrates are animals without backbones and there are many different types, including insects, spiders, sponges, snails, octopuses, clams, squid, jellyfish, anemones, corals, starfish, sea urchins, worms - that's just the short list!
Some scientists estimate that there are possibly as many as 30 million species of living invertebrates - but it's likely that we'll never actually know exactly how many there are in the world.
They're a fascinating and diverse group of animals and you can get close to some of the world's most unique species of invertebrates right here at Chester Zoo. Wander through Butterfly Journey, explore the Aquarium and spend some time in Monsoon Forest on Islands.