David Williams / Ashy Prinia (Prinia socialis), Sri Lanka

Juergen Freund / Two whip coral gobies (Bryaninops yongei) on a black coral sea whip. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Loki whip goby (Bryaninopss loki) on Sea pen (Virgularia gustaviana). Komodo National Park, Indonesia

Wild Wonders of Europe / Banfi / Red mouthed goby (Gobius cruentatus) on seabed, Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Juergen Freund / Crab eyed goby (Signigobius biocellatus) Indo-pacific

Georgette Douwma / Maiden gobies (Valenciennea puellaris) "kissing", Red Sea, Egypt

Chris Newbert / Black-rayed Shrimpgoby (Stonogobiops nematodes) with Shrimp guarding burrow, 80 feet deep, Papua New Guinea

Fred Bavendam / Goby (Amblyeleotris sp) keeping watch while a Snapping Shrimp (Alpheus randalli) excavates their shared burrow, Bali, Indonesia

Nick Upton / Young Edible crab (Cancer pagurus) and a Rock goby (Gobius paganellus) side by side in a rock pool, looking towards the camera, The Gower, Wales, UK, August.

Alex Mustard / Cleaning goby (Elacatinus genie) hovering in mid-water. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Lemon coral goby (Gobiodon citrinus) shelters in the branches of a coral (Acropora sp.). Gubal Island, Egypt. Strait Of Gubal, Red Sea.

Alex Mustard / A portrait of a tiny Unicorn goby (Cerogobius petrophilus). Gubal Island, Egypt. Red Sea.

Alex Mustard / Convict blennies (Pholidichthys leucotaenia) swim across a coral reef with seafan (Melithaea sp.) behind. Misool, Raja Ampat, West Papua, Indonesia. Misool Marine Protected Area. Ceram Sea. Tropical W...