Tony Wu / Crab-eye goby (Signigobius biocellatus), mimics crab with eye-spot markings on dorsal fins and back and forth movement. Loloata Island, Papua New Guinea.

Georgette Douwma / Translucent coral goby (Bryaninops erythrops) in Seapen (Virgularia gustaviana). Komodo National Park, Indonesia. Indo-West Pacific.

Fred Olivier / Watchman goby (Cryptocentrus cinctus) and alpheid shrimp mutualism, the goby keeps watch while the shrimps dig and clean a shared burrow in the sand, Uepi Island, Solomon Islands.

Pedro Narra / West African mudskipper (Periophthalmus barbarus) Joao Vieira Poillo , Bijagos Archipellago. Guinea Bissau

Alex Mustard / Spotlight goby (Gobiosoma louisae) looking out from inside a Yellow tube sponge (Aplysina fistularis), growing on a coral reef. Bloody Bay Wall, Little Cayman, Cayman Islands, British West Indies. Car...

Alex Mustard / Large whip goby (Bryaninops amplus) with a parasitic copepod (with two trailing egg ribbons) perched on Red whip coral. Whale Rock. Fiabacet Islands, Misool, Raja Ampat, West Papua, Indonesia. Ceram S...

Alex Mustard / Common ghostgoby (Pleurosicya mossambica) with another fish in its mouth on soft coral (Dendronephthya sp.). Tulamben, Bali, Indonesia. Java Sea

Nick Upton / Common prawns (Palaemon serratus) and a Rock goby (Gobius paganellus) feeding on a dead Montagu's crab (Xantho hydrophilus) in a rockpool, Cornwall, England, UK, September.

Nick Upton / Rock goby (Gobius paganellus) stealing food from a scavenging Common prawn (Palaemon serratus) in a rockpool, Cornwall, England, UK, September.

Alex Mustard / Glasseye snapper (Heteropriacanthus cruentatus) head portrait with a cleaning Goby (Gobiosoma genie) East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

David Fleetham / Fire Dartfish / Fire Goby (Nemateleotris magnifica) against colourful coral. Fiji's outer reef.

Todd Mintz / Sharknose cleaner goby (Gobiosoma evelynae) pair sheltering in hard coral, Netherlands Island, Dutch Antillies, Caribbean

Jurgen Freund / Two Twinspot / Crabeye gobies (Signigobius biocellatus) West New Britain, Papua New Guinea.

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

David Fleetham / Goby (Eviota sp) and juvenile porcelain crab (Pteroeides sp), on a Seapen. Komodo National Park, 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

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

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

Brandon Cole / Goby {Gobiidae} on gorgonian sea fan, Indonesia.

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

Magnus Lundgren / Wild Wonders of China / Wolfsnout goby (Luposicya lupus) Green Island, Taiwan.

Shane Gross / Bilobed ghost goby (Pleurosicya bilobata) with translucent skin hidden against Seagrass blade. Manado, North Sulawesi, Indonesia.

Pascal Kobeh / Stony coral ghostgoby (Pleurosicya micheli) camouflaged on Sea pen (Pennatulacea). Philippines.

Claudio Contreras / Pallid goby ( Coryphopterus eidolon ), Cozumel Island, Caribbean Sea, Mexico.

Claudio Contreras / Goby (Elacatinus sp.) on Lesser Starlet Coral (Siderastrea radians), Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May

Claudio Contreras / Glass goby (Coryphopterus hyalinus) Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, Vulnerable.

Claudio Contreras / Bridled Goby (Coryphopterus glaucofraenum), Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May

Alex Mustard / Portrait of a rock goby (Gobius paganellus). Swanage, Dorset, England, United Kingdom. English Channel. North East Atlantic

Alex Mustard / Two-spot goby (Gobiusculus flavescens) looks out from a hole. Swanage, Dorset, England, United Kingdom. English Channel. North East Atlantic

Alex Mustard / Pink eye goby (Bryaninops natans) perches on hard coral (Acropora sp.). Gubal Island, Egypt. Strait Of Gubal, Red Sea.

Alex Mustard / Pink eye goby (Bryaninops natans) hovers over a coral. This fish seems to have its ovipositor extended and may have been laying eggs. Laamu Atoll, Maldives. Indian Ocean

Alex Mustard / Close up photo of a Cleaning goby (Elacatinus genie) on a coral reef. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Aflo / Goby (Lubricogobius exiguus) two hiding in sea shell, Pacific ocean.

Sirachai Arunrugstitchai / Wire coral goby (Bryaninops yongei) resting on its host Wire coral (Cirrhipathes), Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / A mixed school of diagonal-banded sweetlips (Plectorhinchus lineatus) and ribbon sweetlips (Plectorhinchus polytaenia) gather above plate corals, with convict blennies (Pholidichthys leucotaenia). Sau...

Georgette Douwma / Yellow pygmy goby (Lubricogobius exiguus) in a discarded bottle. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Yellowskin goby (Paragobiodon xanthososma). deep in branching coral. Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Pinkeye goby (Bryaninops natans). Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Wide-barred shrimp goby fish (Amblyeleotris latifasciata). Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Common ghostgoby (Pleurosicya mossambica) perched on a Blue club tunicate (Rhopalaea crassa). Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Common ghostgoby (Pleurosicya mossambica) perched on a Blue club tunicate (Rhopalaea crassa). Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Large whip goby (Bryaninopsis amplus) on whip coral. Lembeh Strait, North Sulawesi, Indonesia.

Chris Shields / Illustration of Sand goby (Pomatoschistus minutus)

Nick Upton / Juvenile Edible crab (Cancer pagurus) among Common mussels (Mytilus edulis) in a rock pool with a Rock goby (Gobius paganellus) in the background, Gower Peninsula, Glamorgan, Wales, UK, August.

Nick Upton / Rock gobies (Gobius paganellus) and a juvenile Shore crab (Carcinus maenas) scavenging amongst Common Mussel shells (Mytilus edulis) in a rock pool, Gower Peninsula, Glamorgan, Wales, UK, August.

Sergio Hanquet / Goldspot goby (Gnatholepis thompsoni) Tenerife, Canary Islands.