Invertebrates

Invertebrates are animals without a backbone: insects, spiders, crustaceans, molluscs, corals, worms, jellyfish and more. They make up the overwhelming majority of animal life and run the planet’s pollination, decomposition, and ocean food webs.

7 guides in this group

Invertebrates NE Box Jellyfish Chironex fleckeri The Australian box jellyfish carries enough venom to kill a person in minutes, hunts actively with 24 eyes, and swims rather than drifts. Learn what makes this cube-shaped animal so deadly. Read the guide →

Invertebrates LC Emperor Scorpion Pandinus imperator The emperor scorpion is one of the largest scorpions on Earth, yet its sting is milder than a bee's — it kills with its massive pincers instead. Learn why it glows under UV and carries its young. Read the guide →

Invertebrates NE Honeybee Apis mellifera The honeybee runs a colony of tens of thousands, navigates by the sun, and tells hivemates where to find flowers with a dance. Learn how the hive works and what's behind the decline in bee health. Read the guide →

Invertebrates NE Praying Mantis Mantis religiosa The praying mantis is an ambush hunter that strikes in under 70 milliseconds, turns its head 180 degrees, and hears bats with a single ear. Learn how it hunts and the truth about sexual cannibalism. Read the guide →

Invertebrates LC Common Octopus Octopus vulgaris The common octopus has three hearts, blue blood, and two-thirds of its neurons in its arms. Learn how it changes colour in a heartbeat, solves puzzles, and lives just one to two years. Read the guide →

Invertebrates NE Goliath Birdeater Theraphosa blondi The goliath birdeater is the heaviest spider in the world, with 2-centimetre fangs and a coat of barbed defensive hairs. Learn what it actually eats, how it hisses, and why it rarely bites people. Read the guide →

Invertebrates VU Monarch Butterfly Danaus plexippus The monarch butterfly makes a 4,000 km migration that takes several generations, guided by a sun compass. Learn how milkweed makes it toxic and why monarch numbers have crashed. Read the guide →