The Insiders

Clown Anemonefish peek out from an anemone's tentacles in the waters of the Lembeh Strait, Indonesia. Each Anemonefish has an extra pair of eyes in its mouth, those of a parasitic isopod.

The Wildlife Photographer of the Year finalists were selected from some 50,000 entries and the overall winners will be announced on Oct. 17. London's Natural History Museum, which organizes the competition, will host an exhibition of the best entries.