Common fusegoby
Fusigobius neophytus
The Common fusegoby features a slender body, typically with a translucent to pale yellow hue and distinct dark markings along its dorsal fin.
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About the Common fusegoby
A tiny sand-perching goby from Indo-Pacific reefs, it spends its days sitting on rubble or sand patches and making quick dashes for tiny prey. The body is semi-translucent with fine speckling and a small black spot on the first dorsal, and it usually shows up alone or in small loose groups.
Also known as
Quick Facts
Size
7.5 cm
Temperament
Peaceful
Difficulty
Intermediate
Min Tank Size
40 gallons
Lifespan
3-5 years
Origin
Indo-Pacific
Diet
Carnivore - small benthic invertebrates; accepts small meaty foods like Artemia and mysis
Water Parameters
21-30°C
8.1-8.4
Need a heater for this species?
This species needs 21-30°C in a 40 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- Give it at least a 40 US gallon marine tank with open sand and scattered rubble; this goby perches on those patches and makes quick dashes for prey.
- Keep temperature between 21-30 C and pH at 8.1-8.4; aim for steady values within that range.
- Feed as a carnivore: offer small meaty foods like Artemia and mysis, delivered to the bottom where it hunts tiny benthic invertebrates.
- Pair with peaceful tankmates and skip large or boisterous fish that might outcompete or harass a small, gentle goby.
- Keep one individual or a small loose group if the tank has multiple perching spots and plenty of open substrate.
- Expect a maximum size around 7.5 cm and a lifespan of roughly 3-5 years when its needs are met.
- ID check: a semi-translucent, finely speckled body with a small black spot on the first dorsal marks the Common fusegoby (Fusigobius neophytus).
Compatibility
Good Tankmates
- Peaceful midwater cardinalfish that ignore sand perchers (e.g., Pajama, Banggai, Zoramia types)
- Firefish/dartfish (Nemateleotris) that stay in the water column and are calm
- Small, shy wrasses like possum wrasses (Wetmorella) or pink-streaked wrasse (Pseudocheilinops)
- Small, peaceful clownfish like ocellaris or percula
- Other small, peaceful gobies; a loose group of F. neophytus can work if added together with multiple sand patches and hides
- Reef-safe ornamental shrimp, snails, and small hermits; the goby ignores healthy adults
Avoid
- Predators large enough to swallow a 7.5 cm goby (lionfish, groupers, moray eels, large hawkfish, big wrasses)
- Aggressive, territorial fish that harass small bottom dwellers (dottybacks, aggressive damsels, maroon clowns, triggers)
- Large sand-sifters and bottom bulldozers that outcompete or displace it (Valenciennea sleeper gobies, goatfish)
- Opportunistic crabs or mantis shrimp that may prey on small fish
The common fusegoby (Fusigobius neophytus) is a small, peaceful Indo-Pacific marine goby that spends most of the day perched on sand or rubble, making quick dashes for tiny prey. It has a semi-translucent, finely speckled body with a neat black spot on the first dorsal fin. Adults top out around 7.5 cm and live about 3-5 years in aquaria with steady care.
Origin and natural habitat
This species occurs on Indo-Pacific reefs, most often on open sand and rubble patches between coral heads. You will see it sitting low to the bottom, watching for small benthic invertebrates, then darting out and settling back again. In the wild it is encountered singly or in small, loose groups rather than tight schools.
Aquarium setup and water conditions
Provide at least a 40-gallon marine tank to give the fish stable conditions and room for open sand areas. A soft sand substrate with scattered rubble or small rock pieces suits its perching lifestyle and hunting style. Gentle to moderate flow across the bottom helps keep fine foods suspended without blasting the fish off its perch. Rockwork for cover is useful, but leave clear sand patches where it can sit and watch for food.
- Temperature: 21-30 C
- pH: 8.1-8.4
Like many small gobies, it may leap if startled. A tight-fitting cover is a wise precaution.
Diet and feeding
The common fusegoby is a carnivore that targets tiny benthic invertebrates. In aquaria it accepts small meaty foods such as Artemia and mysis. Offer bite-size portions that reach the bottom, and give it time to eat without competition from faster fish. Daily feedings work well for a small, active hunter like this.
New arrivals may respond best to live or freshly thawed foods at first. Once settled, most take frozen Artemia and mysis readily.
Behaviour and tankmates
This is a peaceful goby that spends much of its time perched and unhurried. It generally ignores other small, non-aggressive fishes and does best with calm tankmates that will not outcompete it for food. You can keep a single individual, and in larger tanks with ample food and multiple sand patches, more than one may settle without issue.
Because it hunts tiny invertebrates on the substrate, very small ornamental crustaceans can be at risk.
Common pitfalls to avoid
- Food competition: Housing with boisterous or fast-feeding fish can leave this goby underfed. Target feed small meaty foods to its perch.
- Bare or coarse bottoms: No sand or an overly rough substrate reduces natural perching and hunting opportunities. Provide fine sand with some rubble.
- Predatory tankmates: Larger or aggressive species may harass or eat a small goby.
- Uncovered tanks: Small gobies often jump if startled; use a secure lid.
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