False clown anenomefish (Amphiprion ocellaris) in the tentacles of its host anemone, Celebes Sea, Sabah, Malaysia, Southeast Asia, Asia

Pink anenomefish (Amphoprion perideraion) dominant female, lives in symbiotic association with its host anemone, Matangi Island, Vanua Levu, Fiji, Pacific

Dusky anenomefish (Amphiprion melanomas) dominant female, lives in symbiotic association with its host anemone, Matangi Island, Vanua Levu, Fiji, Pacific

Bubble coral shrimp (Vir philippinensis) on bubble coral (Plerogyra sp.), Philippines, Southeast Asia, Asia

False clown anenomefish (Amphiprion ocellaris) in the tentacles of its host anenome, Celebes Sea, Sabah, Malaysia, Southeast Asia, Asia

Anemone shrimp (Periclimenes holthuisi) in the tentacles of its host anemome, Queensland, Australia, Pacific

Barrier reef anenomefis (Amphiprion akindynos) in tentacles of host anemone in symbiosis, Queensland, Australia, Pacific

A pink anemonefish (Amphiprion perideraion) swims among the tentacles of its host anemone in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A spotted porcelain crab, Neopetrolisthes maculatus, snuggles into its host anemone in Komodo National Park, Indonesia.

Tomato clownfish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Pink anemonefish in its host anenome, Fiji.

Tomato clownfish in its host anenome, Beqa Lagoon, Fiji.

Pink anemonefish (Amphiprion perideraion) on its host anenome, Fiji.

Orange-fin anemonefish (Amphiprion chrysopterus) in its host anenome, Fiji.

Tomato clownfish in its host anenome, Fiji.

Pink anemonefish (Amphiprion perideraion) with its host anemone, Yap, Micronesia.

Sea nettle is host to a small shrimp in the Atlantic Ccean off the coast of North Carolina.

A Clark's anemonefish (Amphiprion clarkii) snuggles amongst its host's tentacles on a reef in Lembeh Strait, Indonesia.

A young false clownfish (Amphiprion ocellaris) snuggles into its host anemone in Komodo National Park, Indonesia.

A Clark's anemonefish (Amphiprion clarkii) snuggles amongst its host's tentacles on a reef in Lembeh Strait, Indonesia.

False clownfish (Amphiprion ocellaris) swim near their host anemone in Alor, Indonesia. This remote region is known for its beautiful reefs and spectacular marine biodiversity.

A pink anemonefish (Amphiprion perideraion) swims among the tentacles of its host anemone in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A porcelain crab sits on its host anemone in Lembeh Strait, Indonesia.

A false clownfish, Amphiprion ocellaris, swims among the tentacles of its host anemone in Raja Ampat, Indonesia.

A pink anemonefish, Amphiprion perideraion, swims above its beautiful host anemone in Wakatobi National Park, Indonesia.

A Clark's anemonefish (Amphiprion clarkii) snuggles into the tentacles of its host anemone in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A spine-cheeked anemonefish (Premnas biaculeatus) swims among the tentacles of its host anemone in Wakatobi National Park, Indonesia.

Several anemonefish wait outside while their anemone host closes up to feed, Raja Ampat, Indonesia.

Larvae stage of Tent Moth, Eastern Tent Caterpillars, make tent of silk on host hedgerow in County Cork, Ireland

Larvae stage of Tent Moth, Eastern Tent Caterpillars, make tent of silk on host hedgerow in County Cork, Ireland

Larvae stage of Tent Moth, Eastern Tent Caterpillars, make tent of silk on host hedgerow in County Cork, Ireland

Larvae stage of Tent Moth, Eastern Tent Caterpillars, make tent of silk on host hedgerow in County Cork, Ireland

Larvae stage of Tent Moth, Eastern Tent Caterpillars, make tent of silk on host hedgerow in County Cork, Ireland

Larvae stage of Tent Moth, Eastern Tent Caterpillars, make tent of silk on host hedgerow in County Cork, Ireland

Wearing tree bark cloth masks and skirts, dancers representing fish spirits are invited during the season of the peach palm harvest to drink the juice. it is a feast and ritual exchange: the host group offers the spirits large quantities of peach palm juice, smoked meat and fish, and shaman-blessed coca and snuff. the visitors are the costumed dancers impersonating animal spirits. people eat the meat and fish, animal spirits receive the fruits of peach palm, which are cultivated, harvested, and processed by humans. this exchange expresses the idea that people and animals depend on each other for survival and reproduction. vaupes basin, eastern colombia amazon, population: 600

Clark's anemonefish (Amphiprion clarkii) in host anemone (Entacmaea quadricolor). Komodo, Indonesia, Pacific Ocean.

Castor Bean Tick (Ixodes ricinus), tick on human skin, tick bite, removal by tick card

Red-billed oxpecker (Buphagus erythrorhynchus), adult, stands on zebra, host animal, symbiosis, Addo Elephant National Park, Eastern Cape, South Africa, Africa

Eelegant squat lobster, Allogalathea elegans, a type of crab, on host crinoid.

Sharksuckers, Echeneis naucrates, swimming with sea turtle, Red Sea.

Castor Bean Tick (Ixodes ricinus), tick on human skin, tick bite

Both a Crinoid Commensal Shrimp (Periclimenes cornutus) and a Crinoid Squat Lobster (Allogalathea elegans) on a crinoid. These tiny crustaceans are commensal on crinoids or feather stars and take their color from the host, Philippines