Shane Gross / Yellow clownfish (Amphiprion sandaracinos) in sea anemone, Indonesia.

Gary Bell/ Oceanwide / Golden Anemonefish (Amphiprion sandaracinos) in sea anemone, Milne Bay, Papua New Guinea

Linda Pitkin / Green finger sponge (Iotrochota birotulata), with colonies of Golden zoanthids (Parazoanthus swiftii), on Netted barrel sponge (Verongula gigantea), on coral reef Klein Bonaire, Bonaire, Leeward Antil...

Alex Mustard / Orange anemonefish (Amphiprion sandaracinos) in its host Mertens' carpet sea anemone (Stichodactyla mertensii). Mabul Island, Sabah, Borneo, Malaysia. Celebes Sea / Sulawesi Sea.

Constantinos Petrinos / Golden anemone (Condylactis aurantiaca) Athens, Attica Region, Greece, Saronic Gulf, Aegean Sea. August.

Pascal Kobeh / Diver on top of a coral reef with Orange anemonefish (Amphiprion sandaracinos) in a Merten's sea anemone (Stichodactyla mertensii) and a Pink anemonefish (Amphiprion perideraion). It is rare to see di...

Pascal Kobeh / Orange anemonefish (Amphiprion sandaracinos) in a Merten's sea anemone, Philippines. Sulu Sea.

Pascal Kobeh / Orange anemonefish (Amphiprion sandaracinos) in a Merten's sea anemone, Manado, Indonesia. Sulawesi Sea.

Solvin Zankl / Golden Anemone (Condylactis aurantiaca) San Pietro Island, Sardinia, Italy, Mediterranean, July

Fred Bavendam / Clark's Anemonefish (Amphiprion clarkii) and Golden Anemonefish (Amphiprion sandaracinos) and sea anemones on a shallow reef, Bali, Indonesia

Lewis Jefferies / Snakelocks anemone (Anemonia viridis) flowing in the current on frond of Golden kelp (Laminaria ochroleuca). Lamora Cove, West Cornwall, UK, Atlantic Ocean.

Franco Banfi / Glass shrimp / Cleaner shrimp (Periclimenes scriptus) commensal with Sand anemone (Condylactis aurantiaca) Vis Island, Croatia, Adriatic Sea, Mediterranean.