David Hall / Sea urchin shrimp on venemous urchin {Periclimenes colemani & Asthenosoma} Papua New Guinea

Shibai Xiao / An old man sitting in front of his house with arm deformed by Hundred-pace pitviper snake bite (Deinagkistrodon acutus) Fanjingshan National Nature Reserve, Guizhou Province, China, June 2008.

John Cancalosi / Tropical Milksnake (Lampropeltis triangulum)with neck coiled in striking pose. This is a non-venemous constrictor. Santa Rosa National park tropical dry forest, Costa Rica.

John Cancalosi / Tropical Milksnake (Lampropeltis triangulum) on trunk in strike pose. This is a non-venemous constrictor. Santa Rosa National park tropical dry forest, Costa Rica.

Doug Wechsler / Midget Faded Rattlesnake (Crotalus viridis concolor) defensively coiled. Garfield County, Colorado, USA, June.

Pete Oxford / Redtail Boa (Boa constrictor constrictor) captive, Ecuador

David Hall / Sea urchin shrimp {Periclimenes colemani} on venemous urchin {Asthenosoma} Papua New Guinea

Michael D. Kern / Sri Lanka bamboo / pit viper {Trimeresurus trigonocephalus} captive, Sri Lanka

Barry Mansell / Midget Faded Rattlesnake (Crotalus viridis concolor) New Mexico, USA

John Cancalosi / Bark Scorpion {Centruroides exilicauda} close-up of telson (stinger) Arizona, USA.

Tony Phelps / Scorpion {Parabuthus granulatus} - South Africa's most venomous scorpion, Oudtshoorn, Little Karoo, South Africa.

Peter Blackwell / Black mamba, head raised {Dendroaspis polylepis} Kenya, Africa