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Brown Clown Goby

Gobiodon fulvus

A small, golden-brown clown goby, hardy and affordable, perfect for nano reefs with branching corals.

Family
Gobiidae
Origin
Pacifico occidentale: dalle isole Ryukyu fino alla Micronesia e Samoa.
Origin
Tropical oceans and reefsEast Asia
Tank use
Used in 0 tanks

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Species challenges
Water Temperature

24 °C - 28 °C

pH Value

8.1 - 8.4

Water type

Marine

Tank level

Bottom

Adult size

4.5 cm

Species description

Geographical Origin and Habitat: Western Tropical Pacific: from Ryukyu Islands to Micronesia and Samoa. Inhabits live Acropora colonies in shallow reef lagoons.

Taxonomy and Morphology: Member of the family Gobiidae. Deep, scaleless body covered with slippery skin. Reaches a maximum length of 4.5 cm.

Social Behavior: Sedentary and coral-dwelling. Lives in pairs and is territorial towards other Gobiodon. Extremely peaceful with other genera.

Coloration and Sexual Dimorphism: Body is uniformly golden-brown or light brown without markings or spots. No distinct sexual dimorphism.

Care, breeding and tankmates

Aquarium Setup: Suitable for nano reef aquariums of at least 40 liters. Housed best with live branching Acropora corals.

Diet and Feeding: Carnivorous. Feeds on zooplankton. Provide fine foods like cyclops, copepods, and rotifers three times daily.

Water Quality: Maintain stable marine parameters: temperature 24-28 °C, pH 8.1-8.4, salinity SG 1.020-1.025. Standard reef filtration.

Compatibility and Cohabitation: Peaceful with other tankmates. Do not house with large predatory fish. May nip host coral tissue to lay eggs.

Aquarium Breeding: Bidirectional hermaphrodite. Monogamous pairs lay eggs on host coral branches. Captive breeding is difficult due to larval size.

Risks and Diseases: Starvation in newly set up tanks. High resistance to skin parasites due to its thick, toxic mucus coat.

Fish profile

Temperament
Pacifico
Diet
Carnivoro
Tank level
Bottom
Minimum group
1
Adult size
4.5 cm
Minimum tank volume
40 L
GH
n/a
KH
8 dKH - 12 dKH
TDS
n/a
Conductivity
n/a
Sex ratio
Coppia
Feeding frequency
3 volte al giorno
Bioload
Low
Flow
Moderato
Reproduction
Ermafrodita bidirezionale. Nidifica deponendo uova sulle Acropore.
Compatibility & tankmates
Molto pacifico con altri pesci. Può aggredire coinquilini della stessa specie se la vasca è troppo piccola.

Ecological Estimates & Biological Models

Trophic level
2.9 ± 0.4 se
Resilience
High (less than 15 months)
Phylogenetic uniqueness (PD50)
0.5
Bayesian Length-Weight
a = 0.00741, b = 3.09
VulnerabilityLow vulnerability (10 / 100)

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Related species

Other recommended species with similar care requirements and water parameters.

Last updated: 06/13/2026