Diamond Goby Care Guide

Valenciennea puellaris · Saltwater Goby

Diamond Goby
AI-generated illustration of Diamond Goby
Adult size
~5.9″ (15 cm)
Suggested tank
20+ gal
Placement
Sandbed
Flow
Medium

What Diamond Goby look like

The Diamond Goby (Valenciennea puellaris) exhibits a streamlined, elongated body that can reach a maximum adult size of approximately 6 inches (15 cm). Its coloration is characterized by a pale body adorned with numerous small, diamond-shaped spots that vary in hue from blue to green, providing effective camouflage against sandy substrates. Sexual dimorphism is subtle, with males typically displaying slightly larger fins and more vibrant coloration during breeding periods. This species possesses a distinctive, elongated dorsal fin that extends into a filamentous structure, enhancing its hydrodynamic efficiency. Additionally, the Diamond Goby features a prominent lateral line system that aids in detecting vibrations in the water, and its dentition is adapted for a diet primarily consisting of small invertebrates found in the substrate. Defensive adaptations include rapid burrowing behavior into the sand to evade predators.

Behavior & temperament

The Diamond Goby is a social fish that exhibits a hierarchical structure within its population, often forming small groups in the wild. It primarily occupies the substrate level of the reef, where it engages in constant foraging and burrowing activities. Breeding behavior involves elaborate courtship displays, where males perform swimming displays and fin flares to attract females. The species is generally peaceful but can exhibit territorial aggression towards conspecifics, especially during breeding. Its behavior includes frequent darting movements and a unique feeding strategy where it sifts through the sand to extract food, demonstrating a high level of activity and interaction with its environment.

Diet & feeding

In the wild, the Diamond Goby primarily feeds on small benthic invertebrates, including copepods and amphipods. In captivity, it requires a varied diet of high-quality sinking pellets, frozen or live foods such as brine shrimp and mysis shrimp, and should be supplemented with occasional vegetable matter.

Behind the name

The genus name 'Valenciennea' is derived from the name of the French naturalist Achille Valenciennes, while 'puellaris' is Latin for 'of a girl' or 'maiden-like', possibly referring to its delicate appearance.

Plan your tank

Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.

Keeping Diamond Goby?

AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.

Get AquaLens Free