David Fleetham / Hawaiian pom-pom / boxer crab (Lybia edmondsoni)with anemones (Triactis sp) that it carries around holding with the claws and using them for defense, waving in front of the possible aggressor. An exam...

Tui De Roy / Wolf-Volcano giant tortoise (Chelonoidis nigra becki) portrait with ground finch (Geospiza sp. ) sitting on foot, Isabela Island, Galapagos. Did you know? Galapagos tortoises have a mutualistic relati...

David Hall / Yellow prawn-goby (Cryptocentrus cinctus) and Snapping shrimp (Alpheus sp). Mutualistic symbiosis with goby as watchdog and shrimp maintaining burrow. Komodo, Indonesia.

David Fleetham / Hawaiian pom-pom / boxer crab (Lybia edmondsoni)with anemones (Triactis sp) that it carries around holding with the claws and using them for defense, waving in front of the possible aggressor. An exam...

Staffan Widstrand / Interior of an ant plant, Myrmecophyte, that lives in a mutualistic association with a colony of ants. Lowland rainforest, Aiduma Island, near Triton Bay, Mainland New Guinea, Western Papua, Indonesi...

Doug Perrine / Green sea turtle (Chelonia mydas) being cleaned by yellow tangs (Zebrasoma flavescens) at a cleaning station where the turtles are groomed by the fish in a mutualistic, symbiotic relationship, Puako,...

Doug Perrine / Green sea turtle (Chelonia mydas ) being cleaned by herbivorous cleaner fish species Yellow tangs (Zebrasoma flavescens) and Gold-ring surgeonfish (Ctenochaetus strigosus) that graze algae off of turt...

Paul Bertner / Ponerine Ant (Ectatomma sp) guarding Treehopper (Membracidae) nymphs as part of mutualistic relationship, Valle del Cauca, Colombia

David Fleetham / An endemic Hawaiian pom-pom crab / Boxer crab (Lybia edmondsoni) carrying a juvenile Anemone (Triactis producta) in its claws as a defense mechanism. A mutualistic symbiosis, with the anemone being tr...

Emanuele Biggi / Hydnophytum formicarum, a myrmecophile plant that live in a mutualistic association with a colony of ants. Detail of internal structures. Bako National Park, Borneo.

Emanuele Biggi / Hydnophytum formicarum, a myrmecophile plant, that lives in a mutualistic association with a colony of ants. Bako National Park, Borneo.