Chien Lee / Giant Crab Spider (Sparassidae) feeding on tree frog prey, Digul River, Papua, Indonesia

Chien Lee / Giant Crab Spider (Sparassidae) feeding on young Peacock Day Gecko (Phelsuma quadriocellata), Madagascar

Paul Bertner / Giant Crab Spider (Sparassidae) juvenile, Hitoy Cerere Biological Reserve, Costa Rica

Paul Bertner / Giant Crab Spider (Sparassidae) mother with spiderlings, Udzungwa Mountains National Park, Tanzania

Jeff Rotman / Japanese Giant Spider Crab (Macrocheira kaempferi) World's Largest Crustacean in Tokyo Aquarium, Japan.

Alex Mustard / West Indian spider crab (Mithrax spinosissimus) shelter in a giant barrel sponge (Xestospongia muta) on a coral reef. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Thomas Marent / Huntsman Spider (Olios sp) female, Tatama National Park, Colombia

Paul Bertner / Giant Crab Spider (Sparassidae) feeding on moth prey, Udzungwa Mountains National Park, Tanzania

Chien Lee / Huntsman Spider (Pandercetes sp) female guarding egg sac, Gunung Lucia, Tawau Hills Park, Sabah, Borneo, Malaysia

David Fleetham / Japanese spider crab (Macrocheira kaempferi) the largest arthropod in the world in terms of leg span, reaching over 12 feet and weighing up to 41 pounds, Japan.

Chien Lee / Huntsman Spider (Chrosioderma sp) female guarding eggs on leaf underside, Andasibe, Madagascar

Chien Lee / Huntsman Spider (Chrosioderma sp) female guarding eggs on leaf underside, Andasibe, Madagascar