Georgette Douwma / Kaleidoscopic image of Clark's anemonefish (Amphiprion clarkii), Ambon, Indonesia.

David Hall / Blue damselfish (Pomacentrus pavo), portrait. Komodo, Indonesia.

David Hall / Pink clownfish (Amphiprion perideraion), four swimming over Magnificent anemone (Heteractis magnifica). Komodo, Indonesia.

David Hall / Pink clownfish / anemonefish (Amphiprion perideraion) swimming over Magnificent anemone (Heteractis magnifica). Komodo, Indonesia.

Shane Gross / Sergeant major damselfish (Abudefduf saxatilis) shoal. Nassau, Bahamas.

Magnus Lundgren / Wild Wonders of China / Damselfish (Pomacentridae) defending eggs, Kenting National Park, Hengchun Peninsula, Taiwan

Magnus Lundgren / Wild Wonders of China / Speckled damsel (Pomacentrus bankanensis) Kenting National Park, Hengchun Peninsula, Taiwan

Magnus Lundgren / Wild Wonders of China / Pacific sergeant (Abudefduf vaigiensis) Green Island, a small volcanic island in the Pacific Ocean , Taiwan

Magnus Lundgren / Wild Wonders of China / Indo-Pacific sergeant (Abudefduf vaigiensis) Green Island, a small volcanic island in the Pacific Ocean , Taiwan

Magnus Lundgren / Wild Wonders of China / Indo-Pacific sergeant (Abudefduf vaigiensis) Green Island, a small volcanic island in the Pacific Ocean , Taiwan

Magnus Lundgren / Wild Wonders of China / Tomato clownfish (Amphiprion frenatus) in sea anemone, Green Island, a small volcanic island in the Pacific Ocean, Taiwan