Jack Dykinga / Agave (Agave utahensis) close up of spines with Pinyon pine cone (Pinus edulis) wedged amongst them. Grand Canyon-Parashant National Monument, Arizona, USA

Ingo Arndt / Saturniid moth caterpillar close up of spines {Automeris banus} Costa Rica

Ingo Arndt / Giant silkworm moth caterpillar close up of spines {Lonomonia cyniva} Carabobo, Venezuela

Ingo Arndt / Saturniid moth caterpillar close up of spines {Syssphinx mexicana} Costa Rica

Ingo Arndt / Moon moth caterpillar with defence spines {Automeris chaconia} Peru

Ingo Arndt / Saturniid moth caterpillar with warning colouration {Syssphinx mexicana} Guanacaste, Costa Rica

Jack Dykinga / Notch-leaf scorpion-weed (Phacelia crenulata) blooming around Desert agave (Agave desertii) in Glorieta Canyon, Anza-Borrego State Park, California, USA, March 2017. These plants are flowering during...

Floris van Breugel / Desert agave (Agave deserti) has skewered a ball of spines shed by neighboring Cholla cactus (Cylindropuntia bigelovii) Anza-Borrego State Park, California, USA March

Roland Seitre / Grand Cayman Blue Iguana (Cyclura lewisi), adult that has been reintroduced to the wild from captive breeding programme. Endangered species.

Jeff Rotman / Wolf eel (Anarrichthys ocellatus) eating Red Sea Urchin (Strongylocentrotus franciscanus). Queen Charlotte Strait, British Columbia, Canada, North Pacific Ocean.

Jeff Rotman / Wolf eel (Anarrichthys ocellatus) eating Red Sea Urchin (Strongylocentrotus franciscanus). Queen Charlotte Strait, British Columbia, Canada, North Pacific Ocean.

Solvin Zankl / Spines of sea urchins from sand sample from Raja Ampat, Indonesia, the wide range of colours of these animals become visible. Diagonal of frame approx. 5 mm Digital focus stacking image