Alex Mustard / Portrait of Saddleback anemonefish (Amphiprion polymnus) Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Alex Mustard / Saddleback anemonefish (Amphiprion polymnus) and a Spotted porcelain crab (Neopetrolisthes maculatus) living together in an anemone. Bitung, North Sulawesi, Indonesia, Lembeh Strait, Molucca Sea.

Alex Mustard / Saddleback anemonefish (Amphiprion polymnus) guarding its clutch of developing eggs, laid on a coconut husk, Bitung, North Sulawesi, Lembeh Strait, Molucca Sea.

Alex Mustard / Black and white saddleback anemonefish (Amphiprion polymnus) nestled in its anemone, Bitung, North Sulawesi, Indonesia, Molucca Sea.

Alex Mustard / Shallow depth of field photo of an adult saddleback anemonefish (Amphiprion polymnus) fanning eggs, laid on a stone near the base of the anemone. Dauin, Dumaguete, Negros, Philippines. Bohol Sea, Trop...

Alex Mustard / Saddleback anemonefish (Amphiprion polymnus) barks a warning as it guards a clutch of developing eggs (beneath it) laid on a small stone, below a fold in its home, a Haddon's sea anemone (Stichoda...

Georgette Douwma / Saddleback anemonefish (Amphiprion polymnus) with a Spotted anemone porcelain crab (Neopetrolisthes maculatus) perched on the edge of the anemone. Tulamben, Bali, Indonesia.

Georgette Douwma / Saddleback anemonefish (Amphiprion polymnus). Tulamben, Bali, Indonesia.