Twycross Zoo is a registered charity (number 501841) which
exists to support conservation, education and research.
These smaller animals make up most of the animals on the planet! Unlike the vertebrates, invertebrates have no “notochord”; They do not have an internal skeleton, but have an external skeleton which is a bit like a suit of armour. This difference may seem minor – but there is such a range of invertebrates from spiders to octopus and starfish to beetles, that there is much more variation within invertebrates than between the invertebrates and vertebrates!