Richard Herrmann / California Yellowtail (Seriola lalandi) pair, San Diego, California

Pete Oxford / Yellow-tailed sawfish / surgeonfish (Prionurus laticlavius) shoal off Wolf Island, Galapagos Islands

Pete Oxford / Yellowtail sawtail / surgeonfish (Prionurus laticlavius) shoal off Wolf Island, Galapagos Islands

Juergen Freund / Mass of Schooling yellowtail scad fish (Trachurus novaezelandiae) beneath Busselton Jetty, Western Australia

Doug Perrine / Yellow tube sponge {Aplysina fistularis} with Yellowtail snappers {Ocyurus chrysurus Cayman Brac, Cayman Islands, Caribbean

Jeff Rotman / Caribbean reef shark {Carcharhinus perezi} and Yellowtail snapper fish (Ocyurus chrysurus) Bahamas

Alex Mustard / Yellowtail damselfish (Microspathodon chrysurus) guards eggs laid on a sea rod coral. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Nigel Cattlin / Yellow-tail moth (Euproctis similis) caterpillar on Hawthorn (Crataegus monogyna) leaf, a minor garden and nursery pest. England, UK.

Gary Bell/ Oceanwide / Clark's Anemonefish (Amphiprion clarkii) juvenile in sea anemone, Papua New Guinea

Georgette Douwma / Kaleidoscopic image of coral reef with soft corals (Dendropnethya) shoal of Yellow back fusilliers (Caesio teres) West Papua, Indonesia.

Richard Robinson / Yellowtail dascyllus (Dascyllus flavicaudus) in coral, at South Minerva Reef also known as Teleki Tonga a disputed territory in the South Pacific between Tonga and Fiji.

Linda Pitkin / Blue and gold fusiliers (Caesio teres) schooling alongside coral reef, Triton Bay, near Kaimana, West Papua, Indonesia