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

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

David Fleetham / Black-chest shrimp goby (Amblyeleotris guttata) and Blind snapping shrimp (Alpheus ochrostriatus), symbiosis. As pictured here, the shrimp always keeps an antennae touching the goby. Fiji.

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

David Hall / Arcfin shrimpgoby (Amblyeleotris arcupinna) and Snapping shrimp (Alpheus sp), blind shrimp maintaining contact with goby via antenna. Mutualism with shrimp maintaining burrow and goby acting as lookou...

David Hall / Shrimpgoby (Amblyeleotris arcupinna). Pantar, Alor Archipelago, Indonesia.

Magnus Lundgren / Wild Wonders of China / Masked shrimpgoby (Amblyeleotris gymnocephala) and shrimp in Lembeh Strai, Sharp Island or Kiu Tsui Chau, Kiu Tsui Country Park, Hong Kong, China.

Magnus Lundgren / Wild Wonders of China / Masked shrimpgoby (Amblyeleotris gymnocephala) and shrimp in Lembeh Strai, Sharp Island or Kiu Tsui Chau, Kiu Tsui Country Park, Hong Kong, China.

David Fleetham / Steinitz' prawn / shrimp goby (Amblyeleotris steinitzi) and Alpheid worker shrimp (Alpheus sp) side by side. Mutualism occurs between the two species, the blind shrimp maintaining the shared burro...

Bert Willaert / Steinitz' Shrimp goby (Amblyeleotris steinitzi), Kimbe Bay, West New Britain, Papua New Guinea

David Fleetham / Red-banded prawn-goby (Amblyeleotris fasciata) Yap, Micronesia.

Tony Wu / Red-margin shrimp goby (Amblyeleotris rubrimarginatus) Bootless Bay, Papua New Guinea

Pascal Kobeh / Djeddah snapping shrimp (Alpheus djeddensis) and Steinitz's goby (Amblyeleotris steinitzi) at hole, these species are symbiotic with the goby guarding the shrimp as it digs, coast of Dhofar and Hallan...

Pascal Kobeh / Red-banded shrimp (Alpheus randalli) and Pinkbar goby (Amblyeleotris aurora) symbiotic pair with goby protecting shrimp as it digs. Maldives. Indian Ocean.

Jurgen Freund / Flagtail shrimp goby (Amblyeleotris yanoi) and shrimp (Alpheus randalli), Bali, Indonesia.

Jurgen Freund / Steinitz' shrimp goby (Amblyeleotris steinitzi) with parasitic nudibranch (Gymnodoris nigricolor) feeding on its dorsal fin, the goby lives in symbiosis with the shrimp who digs a burrow which the gob...

Jurgen Freund / Steinitz' shrimp goby (Amblyeleotris steinitzi) with parasitic nudibranch (Gymnodoris nigricolor) feeding on its dorsal fin, the goby lives in symbiosis with a shrimp who digs a burrow which the goby...

Doug Perrine / Randall's shrimp goby {Amblyeleotris randalli} shares burrow with blind Shrimp {Alpheus sp} which it provides protection to, symbiosis, Kimbe Bay, Papua New Guinea

Doug Perrine / Shrimp {Alpheus ochrostriatus} digging burrow beside symbiotic goby {Amblyeleotris wheeleri} which acts as its 'watchdog' as shrimp is almost blind, Bali, Indonesia

Georgette Douwma / Burgundy shrimp goby {Amblyeleotris whelleri} guarding burrowing shrimp, Bunaken, Sulawesi, Indonesia

Georgette Douwma / Burgundy shrimp goby {Amblyeleotris whelleri} with shrimp, Sulawesi Indonesia

Chris Newbert / Spotted Prawn Goby (Amblyeleotris guttata) portrait 40 feet deep, Solomon Islands

Pete Oxford / Gold-barred Shrimp-goby (Amblyeleotris randalli), Cenderawasih Bay, West Papua, Indonesia

Fred Bavendam / Filament Dartfish (Ptereleotris hanae) emerging from the burrow of Steinitz' Shrimp Goby (Amblyeleotris steinitzi) and Snapping Shrimp (Alpheus sp), Bali, Indonesia

Fred Bavendam / Metallic Shrimp-goby (Amblyeleotris latifasciata) keeps watch while its Snapping Shrimp (Alpheus sp) partner works on their burrow, Bali, Indonesia

Fred Bavendam / Spotted Prawn Goby (Amblyeleotris guttata) sharing a burrow with a Find-striped Snapping Shrimp (Alpheus ochrostriatus), Bali, Indonesia

Fred Bavendam / Metallic Shrimp-goby (Amblyeleotris latifasciata) keeping watch while a Snapping Shrimp (Alpheus sp) works on their shared burrow, Bali, Indonesia

David Fleetham / Steinitz shrimp gobies (Amblyeleotris steinitzi) share a burrow with a Snapping shrimp (Alpheus bellulus), Mabul Island, Malaysia.

Pete Oxford / Arcfin Shrimpgoby (Amblyeleotris arcupinna), Banda Sea, Indonesia