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Home  /  Fish profiles  /  Coral Goby
Coral Goby (Gobiodon spp.)

Coral Goby

Gobiodon spp.
Nano Reef GemCoral PerchingCaution With SPSPeaceful
Family
Goby (Coral / Clown)
Care level
Beginner
Temperament
Peaceful
Reef safe
Reef safe with caution
Max size
4 cm
Min tank
40 L · 11 gal
Origin
Indo-Pacific
Diet
Carnivore
Food
Live copepods, Enriched brine, Small mysis, Calanus, Rotifers
Currently out of stock →Join the waiting list

Overview

The Coral Goby (Gobiodon spp.) — the group that includes the yellow, green and citron clown gobies — is a tiny, big-personality reef fish that lives its whole life among coral branches. Rarely more than 3–4 cm, with a round, clownish face and jewel-bright colours, it perches on corals and rockwork using fused pelvic fins that work like little suction cups, hopping and darting from spot to spot.

In the wild these gobies settle into a single Acropora colony much as a clownfish settles into an anemone, picking pests off the branches and sheltering (and breeding) among the polyps. They even lack scales, relying instead on a thick, bitter, toxic mucus that makes them taste horrible to would-be predators.

Hardy, endlessly charming and cheap enough to be a centrepiece of a nano reef, the Coral Goby is a brilliant beginner fish — with two honest caveats worth understanding before you buy: it's a small-mouthed, timid feeder, and it has a complicated relationship with SPS corals.

Compatibility

Toward other fish the Coral Goby is exceptionally peaceful — so peaceful, in fact, that it's easily out-competed at feeding time and can be intimidated by boisterous tankmates. Keep it with small, docile species (or in a species/nano tank) so it actually gets its share of food. It's ideal alongside other gentle nano fish.

With its own kind it's a different story: coral gobies are territorial toward conspecifics in small tanks, so keep just one per tank, or a bonded pair. Interestingly, you don't need to sex them — these gobies are bidirectional hermaphrodites, so any two individuals sharing a coral will simply sort themselves into a viable male-female pair. Groups are only realistic in large, coral-rich systems.

Health & quarantine

Coral Gobies are hardy little fish once they're feeding well, but that 'once' matters. Imported specimens sometimes arrive thin and starved with a pinched, shrunken belly, so choose a plump, alert individual — this is the single biggest factor in success. They're small-mouthed and timid, so they need tiny foods and a calm feeding environment, and a mature, pod-rich reef gives them plenty to graze between meals. A quiet acclimation into an established tank suits them far better than a brand-new setup. Kept fed and with gentle tankmates, they're disease-resistant and can live around five to six years.

Frequently asked questions

Is the Coral Goby reef safe?
With caution. It's harmless to invertebrates and softies, but it has a real relationship with SPS corals — it may nip at Acropora polyps, and a spawning pair will strip live tissue from the base of branches to lay eggs, causing localised recession. In a large tank with big, healthy colonies this is negligible and the coral recovers; in a small or lightly stocked SPS tank a pair can do noticeable damage. Softie- and LPS-dominated tanks carry the least risk.
How big a tank does it need?
It's a genuine nano fish — a single Coral Goby is happy in something as small as around 40 litres, provided there's branching coral or rockwork to perch on. Bigger is only needed if you want to keep a group, which requires a large, coral-rich system to give each fish its own territory.
Can I keep more than one?
Keep one per tank, or a bonded pair. They squabble with their own kind in tight quarters. The good news is you don't need to find a specific male and female — these gobies can change sex either way, so any two placed together will pair up naturally. Groups only work in large tanks.
How do I make sure it gets enough to eat?
Buy a plump fish to start with, offer small foods it can actually fit in its mouth, and keep it with gentle, non-aggressive feeders so it isn't out-muscled. Target-feeding it directly and maintaining a pod-rich mature reef both help enormously. Keep an eye on its belly in the first few weeks.
Why does it sit on the coral instead of swimming around?
That's exactly what it's built to do. Coral gobies perch and cling using suction-cup-like pelvic fins and live among coral branches for protection — much like a clownfish in an anemone. A goby happily perched and hopping around its host is a relaxed, healthy fish, not an inactive one.
Do I need a coral for it, or will rock do?
It'll live in live rock nooks and crevices, and will often adopt softies or LPS as a perch, so a coral isn't strictly essential. But it's most active, visible and settled when it has branching coral to call home — that's its natural habitat, and it brings out the fish's best behaviour.

Care guidance is drawn from our own experience — every fish is an individual, so treat it as a starting point, not a guarantee. Not sure if a species suits your tank? Come ask us in store. New to the terms? Read the care-terms glossary.