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.

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

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

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.

Georgette Douwma / Yellow pygmy goby (Lubricogobius exiguus) in a discarded bottle. 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.

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.

Claudio Contreras / Goby (Elacatinus sp.) on sponge, Guanahacabibes Peninsula National Park, Pinar del Rio Province, western Cuba.

Claudio Contreras / Goby (Elacatinus sp.) on coral, Guanahacabibes Peninsula National Park, Pinar del Rio Province, western Cuba.

Claudio Contreras / Glass goby (Coryphopterus hyalinus), Guanahacabibes Peninsula National Park, Pinar del Rio Province, western Cuba.

Georgette Douwma / Translucent coral goby (Bryaninops erythrops) resting on Bubble coral (Plerogyra sinuosa). Derawan Islands, East Kalimantan, Indonesia.

Georgette Douwma / Translucent coral goby (Bryaninops erythrops) with parasite under gill, resting on Starfish (Asteroidea). Derawan Islands, East Kalimantan, Indonesia.

Magnus Lundgren / Wild Wonders of China / Many host goby (Pleurosicya mossambica) resting on hard coral, Longdong, Northeast, Taiwan. Lundgren

Magnus Lundgren / Whip gobies (Bryaninops yongei) sitting on coral whip at night. Triton Bay area, West Papua, Indonesia. Magnus

Lorraine Bennery / Endemic Blind Cave Fish (Typhleotris madagascariensis). Only found in the cave systems near Lake Tsimanampetsotsa, Tsimanampetsotsa National Park, south west Madagascar.

David Fleetham / Pair of Yellownose shrimp gobies (Stonogobiops xanthorhinica) with Randalls blind snapping shrimp (Alpheus randalli) excavating their den. Fiji.

David Fleetham / Red-banded prawn-goby (Amblyeleotris fasciata) sharing burrow with Shrimp (Alpheus bellulus) Yap, Micronesia.

Linda Pitkin / Toothy goby (Pleurosicya mossambica), on stony coral. Lembeh Strait, North Sulawesi, Indonesia.

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

Nick Upton / Rock goby (Gobius paganellus) in a rock pool, Rhossili, The Gower Peninsula, UK, August.