Pascal Kobeh / Queen angelfish or blue or golden angelfish (Holacanthus ciliaris) Cozumel Island, Yucatan peninsula, Mexico.

Alex Mustard / Eye of a Masked butterflyfish (Chaetodon semilarvatus). This species is endemic to the Red Sea. Ras Mohammed National Park, Sinai, Egypt. Red Sea

Magnus Lundgren / Wild Wonders of China / Oriental butterflyfish (Chaetodon auripes) Green Island, a small volcanic island in the Pacific Ocean, Taiwan

Magnus Lundgren / Wild Wonders of China / Oriental butterflyfish (Chaetodon auripes) Green Island, a small volcanic island in the Pacific Ocean, Taiwan

Gary Bell/ Oceanwide / Meyer's Butterflyfish (Chaetodon meyeri) being cleaned by Blue-streaked Cleaner Wrasse (Labroides dimidiatus), Great Barrier Reef, Queensland, Australia

Georgette Douwma / Eight-banded butterflyfish (Chaetodon octofasciatus) juvenile. West Papua, Indonesia. Indo-West Pacific.

Gary Bell/ Oceanwide / Cross-hatch Butterflyfish (Chaetodon xanthurus), Anilao, Philippines

Gary Bell/ Oceanwide / Meyer's Butterflyfish (Chaetodon meyeri), Great Barrier Reef, Australia

Gary Bell/ Oceanwide / Latticed Butterflyfish (Chaetodon rafflesi), Anilao, Philippines

Gary Bell/ Oceanwide / Triangle Butterflyfish (Chaetodon triangulum), Anilao, Philippines

Gary Bell/ Oceanwide / Cross-hatch Butterflyfish (Chaetodon xanthurus) pair, Anilao, Philippines

Georgette Douwma / Vagabond butterflyfish (Chaetodon vagabundus). North Sulawesi, Indonesia.