The Citron Goby (Gobiodon citrinus), also known as the Citron Clown Goby, is a small marine fish with fine blue markings around its eyes and gills. Its body colour ranges from pale yellow to brown. It often spends long stretches perched on a coral branch or rock ledge, then darts out to catch food as it passes.
Growing to around 5 cm, the Citron Goby is a good fit for an established nano reef with peaceful tankmates. It’s especially well suited to soft coral displays. Use caution in SPS tanks, as it can nip at Acropora polyps or coral tissue around the base. Small frags are particularly vulnerable.
Quick care guide
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Adult size — Around 5 cm
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Recommended aquarium — Around 40 L or larger, with established rockwork and plenty of perches
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Temperament — Peaceful with most fish, but can be territorial with other clown gobies in small tanks
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Reef compatibility — Suitable for soft coral reefs. Use caution with Acropora and other SPS corals.
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Diet — Small meaty foods such as frozen mysis, enriched brine shrimp and finely chopped marine foods
Simply Fish recommendation
We’d choose the Citron Goby for a peaceful nano reef or soft coral display where you can watch it perch out in the open. Give it a few sheltered spots at different heights and offer small pieces of food near its favourite perch if faster tankmates are beating it to meals.
Frequently asked questions
Is the Citron Goby reef safe?
It generally does well with soft corals. It can nip at Acropora and other SPS corals, and a spawning pair can clear a patch of coral tissue where it lays eggs.
Can I keep a Citron Goby in a nano aquarium?
Yes. An established marine aquarium of around 40 L or larger can suit a single Citron Goby, provided it has stable water conditions and compatible tankmates.
What should I feed a Citron Goby?
Offer a variety of small frozen marine foods, including mysis and enriched brine shrimp. Choose pieces small enough for the goby to swallow easily.
Can I keep two clown gobies together?
They can squabble over perches in smaller tanks. For a nano reef, we recommend keeping a single Citron Goby.
