Most of life on Earth is not like us at all. Barely 5% of all known living creatures are animals with backbones. The rest – at least 1.3 million species, and many more still to be discovered – are spineless. They are the invertebrates, animals of wondrous diversity, unique niches and innovative and interesting ways of making a living on this planet, which include insects (at least a million), arachnids, snails, crustaceans, corals, jellyfish, sponges and echinoderms.

And yet, despite their numerical advantage, originality and dazzling charisma, invertebrates are usually overlooked in favour of animals that more closely resemble ourselves. So, over the last two weeks, we’ve gone in search of the UK’s invertebrate of the year, and profiled 10 different invertebrates – plus the invertebrate nominated by readers, Lumbricus terrestris, the common earthworm.