West Indian manatee (Trichechus manatus), with sharksucker, Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

Bleached soft coral, Sinularia sp. This colony has lost its symbiotic zooxanthellae and turned white due to high water temperatures. Buyat Bay, North Sulawesi, Indonesia, Pacific Ocean.

Soft leather coral, Sarcophyton sp., bleaching. This soft coral has lost its symbiotic algae, zooxanthellae, and turned white due to high water temperatures. Buyat Bay, North Sulawesi, Indonesia, Pacific Ocean.

Coral polyps bleaching, Favia sp. Bleaching occurs when corals stress under high water temperatures and expel their symbiotic zooxanthellae. The coral will starve to death if it does not reacquire zooxanthellae. Buyat Bay, North Sulawesi, Indonesia, Pacific Ocean.

Portrait of a Cape Buffalo (Syncerus caffer) drinking from river carrying two cattle egrets (Bubulcus ibis) on its back in Chobe National Park, Chobe, Botswana

Portrait of a Cape Buffalo (Syncerus caffer) drinking from river carrying two cattle egrets (Bubulcus ibis) on its back in Chobe National Park, Chobe, Botswana

The strings hanging off the dorsal fin of this Great White Shark (Carcharodon carcharias) are parasitic copepods. Photographed just breaking the surface off Guadalupe Island, Mexico

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

Clark's anemonefish (Amphiprion clarkii) in Beaded Sea Anemone (Heteractis aurora), Philippines