Rubbish in Gloucester Docks, England, United Kingdom, Europe

Bubbles of oxygen produced by algae as they photosynthesize

Slime Star Pteraster tesselatus

Close-up of a Waxy monkey tree frog (Phyllomedusa sauvagii) sitting on a branch, Gran Chaco, Paraguay

Calling Waxy monkey tree frog (Phyllomedusa sauvagei) with vocal sac, Gran Chaco, Paraguay

Alligator, Wacodahatchee Wetlands, Florida, Usa