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Arc-fin Shrimpgoby

Amblyeleotris arcupinna

A marine fish species of the family Gobiidae, valued by aquarists for its interesting behavior and beautiful coloration.

Family
Gobiidae
Origin
Oceano Pacifico occidentale, noto in Papua Nuova Guinea, in particolare in barriere coralline poco profonde.
Origin
Tropical oceans and reefsAfrica and MadagascarAustralia, New Guinea, and Oceania
Tank use
Used in 0 tanks

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Species challenges
Water Temperature

23 °C - 27 °C

pH Value

8.1 - 8.4

Water type

Marine

Tank level

Bottom

Adult size

7.5 cm

Species description

Geographical Origin and Habitat: Western Pacific Ocean, known from Papua New Guinea, specifically in shallow coral reefs. Typically found in shallow waters and reef areas rich in hiding places.

Taxonomy and Morphology: Belongs to the family Gobiidae. Characterized by a body structure adapted to its active lifestyle, showing bright coloration. Size up to 7.5 cm.

Social Behavior: Active species with a peaceful temperament. Shows moderate to high territorial habits depending on sex and population density.

Coloration and Sexual Dimorphism: Males and females display visible differences in color pattern and vibrancy, especially during the courtship phase.

Care, breeding and tankmates

Aquarium Setup: Requires a marine tank of at least 21 gallons (approx. 80.0 liters), decorated with live rocks to provide natural shelter. For sand-dwelling wrasses, a fine sand bed of at least 2-3 inches (5-8 cm) is essential.

Diet and Feeding: Carnivorous. Feeds on zooplankton, small crustaceans, and leftover food. Accepts frozen food. It is recommended to feed the fish two or three times daily in small portions.

Water Quality: Stable parameters: temperature 23.0-27.0°C, pH 8.1-8.4, SG stable between 1.020 and 1.025. Monitored nitrates and phosphates.

Compatibility and Cohabitation: Compatible with reef fish. Avoid housing with larger predators or highly aggressive tankmates.

Aquarium Breeding: Demersal spawning. Commonly associates with Alpheus pistol shrimp, laying eggs inside the burrow. No reports of aquarium breeding.

Risks and Diseases: Sensitive to transport stress and high jump risk; requires a tightly fitted aquarium lid.

Fish profile

Temperament
Peaceful
Diet
Carnivorous. Feeds on zooplankton, small crustaceans, and leftover food. Accepts frozen food.
Tank level
Bottom
Minimum group
1
Adult size
7.5 cm
Minimum tank volume
80 L
GH
n/a
KH
n/a
TDS
n/a
Conductivity
n/a
Sex ratio
Singolo o Coppia
Feeding frequency
Giornaliera
Bioload
Low
Flow
Medium
Jump risk
Covered tank required
Reproduction
Deposizione demersale. Si associa comunemente con gamberi del genere Alpheus, depositando uova in tana. Non riprodotto in acquario.
Compatibility & tankmates
Totalmente pacifico. Eccellente compagno per acquari di barriera, specialmente in simbiosi con un gambero pistola.

Ecological Estimates & Biological Models

Trophic level
3.4 ± 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