Neon Goby (Elacatinus oceanops) saltwater aquarium fish portrait

The Neon Goby is a slender cleaner goby that reaches roughly 2 inches, wearing a dark blue to blackish-blue body split lengthwise by a brilliant iridescent light-blue stripe that runs from near the eyes to the base of the tail. The pale markings ahead of the eyes stop short of meeting across the snout, a useful detail for separating this species from the other Caribbean cleaner gobies. Its range covers the western Atlantic and the greater Caribbean, including Florida, the Gulf of Mexico and Caribbean reefs, where it perches on coral heads, rocky outcrops and occasionally large sponges from about 3 to 131 feet.

Adults are comfortable in a marine aquarium of 10 gallons or more, which makes this one of the few reef fishes genuinely suited to small, well-established systems. Build the layout around reef rock with caves, ledges and narrow crevices, since the goby uses these both for shelter and as spawning sites, and a sand bed adds a source of minute crustaceans. A secure cover is important because this species will jump from an open-topped tank. Water chemistry should be held steady within the published aquarium parameters rather than allowed to drift.

On the reef, this goby earns its living as a cleaner, picking ectoparasites and loose debris from the skin, fins, mouth and gill chambers of larger fishes. Gut examinations have turned up larval gnathiid isopods, confirming that parasite removal is a real feeding strategy rather than incidental behavior. That said, cleaning alone will not sustain an aquarium specimen, so a carnivorous menu of small meaty items must be provided.

Offer finely divided frozen and dry foods such as brine shrimp, mysis, chopped shrimp, clam, scallop, krill and marine fish flesh, sized to fit a 2-inch mouth. Feeding once daily suits the species. A newly introduced individual that hesitates to eat can often be coaxed into feeding with fortified live adult brine shrimp before transitioning to prepared items.

Frozen Brine Shrimp Mysis Shrimp Chopped Shrimp Clam Scallop Krill Marine Fish Flesh Marine Flake Or Pellet
Neon Gobies spend their time perched on rock and coral, darting out to inspect passing fishes, and they are peaceful toward unrelated tankmates. Conspecifics are the exception: individuals are territorial toward their own kind and may fight unless they have formed a bond. The species is monogamous, pairs readily and frequently spawns in aquaria, so a mated pair is the safest way to keep more than one. Most larger fishes recognize and tolerate a cleaner, though prudent stocking means avoiding aggressive or fin-nipping species such as groupers, dottybacks, triggerfishes and angelfishes.

This goby is an excellent reef aquarium resident and is considered coral safe, with no documented predation on corals or small fishes. Broader invertebrate compatibility deserves a measure of caution, so observe interactions with mobile invertebrates rather than assuming coral safety extends to everything. The greater risk runs the other direction: mantis shrimp, pistol shrimp and other ambush predators lurking in live rock can kill a fish this small, so screen rockwork before adding one.

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FAQ

Frequently Asked Questions

About the Neon Goby

  • Can a Neon Goby live in a nano reef?
    Yes. At about 2 inches, it is well served by an aquarium of 10 gallons or larger, provided it has rocky caves and crevices and stable marine conditions.
  • Will it get all of its food by cleaning other fish?
    No. Parasite cleaning is its natural feeding strategy, but aquarium specimens need small frozen or dry meaty foods offered once daily.
  • Can more than one Neon Goby be kept together?
    A mated pair is the safest documented arrangement, and pairs often spawn in captivity. Unpaired individuals can be territorial and may fight with their own kind.

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Related Reading

From the Top Shelf blog, tagged for Neon Goby.