SeafanEmergencies

Gobies

Neon goby

Elacatinus oceanops

Also sold as Neon blue goby

Good first fish

Neon goby (Elacatinus oceanops), photographed in the sea or an aquarium
Photo: Jmk7, CC BY-SA 3.0, via Wikimedia Commons
Care level
Beginner
Adult size
5.1 cm in aquariums
Minimum tank
38 litres
Temperament
Peaceful
With corals
Reef safe
Captive-bred
Widely sold captive-bred
IUCN status
Least Concern
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How do you care for the neon goby?

Peaceful; fights its own kind unless a mated pair.

Feeding

Carnivore: small frozen and prepared meaty foods.

Also cleans other fish, which may help with external parasites (LiveAquaria). typical, check

Tank and special needs

Plan for at least 38 litres of water (the care sheet says 10 US gallons).

Nano-friendly.

Corals and invertebrates

None.

Which tankmates suit the neon goby?

Small: keep away from hawkfish, dottybacks and other mouths that fit it.

Suggested order in a mixed tank: add early, with the first peaceful fish.

More than one neon goby

Only as a mated pair, or two juveniles added together. A third neon goby is usually driven out.

Other fish

Checked against the other 59 fish in this guide, assuming a tank big enough for both. Individual fish differ, so treat this as a starting point.

Avoid together (3)

  • Maroon clownfishMaroon clownfish is aggressive and may bully the neon goby, which is small enough to be driven into hiding or killed.
  • Humbug damselHumbug damsel is aggressive and may bully the neon goby, which is small enough to be driven into hiding or killed.
  • Powder blue tangPowder blue tang is aggressive and may bully the neon goby, which is small enough to be driven into hiding or killed.

Take care (5)

  • Bicolor blennyBicolor blennies may nip small gobies and dartfish in small tanks.
  • Midas blennyMidas blennies are known to nip firefish and small gobies.
  • Flame hawkfishFlame hawkfish may attack or eat small bottom-dwelling fish like the neon goby.
  • Longnose hawkfishLongnose hawkfish may attack or eat small bottom-dwelling fish like the neon goby.
  • Falco hawkfishFalco hawkfish may attack or eat small bottom-dwelling fish like the neon goby.
Usually fine together (51)

Invertebrates

Only the invertebrates with a known risk are listed.

Take care (4)

  • Arrow crabThe arrow crab can catch small fish like the neon goby.
  • Tiger tail sea cucumberA stressed or dead tiger tail sea cucumber can release toxins that harm fish; cover pump intakes.
  • Sea appleA stressed or dead sea apple can release toxins that harm fish; cover pump intakes.
  • Green brittle starThe green brittle star can catch small fish like the neon goby.

Corals and anemones

Only the corals and anemones with a known risk are listed.

Take care (1)

These checks follow the reasons fish and invertebrates clash: same species or genus, similar shape, mouth size, temperament, food, burrows, tank size and the order they are added. Individual animals differ; every source agrees on that.

Quarantine and health

Standard quarantine; tiny fish, so keep quarantine tank small and stable.

New fish are the most common way disease gets into a reef tank. Quarantine every fish in a separate tank before it joins the display, and choose a method that suits its tolerance of copper.

Captive-bred or wild?

Commonly captive-bred (ORA, Proaquatix lines listed). Short-lived species, so buy young captive-bred fish.

Sources

  1. LiveAquaria (US retailer) care sheetRead 21 October 2026, read in full. Used for: stats.
  2. FishBase species summaryRead 21 October 2026, read in full. Used for: max length, IUCN.

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