Two Spot Goby Care Guide
Signigobius biocellatus · Saltwater Goby
What Two Spot Goby look like
The Two Spot Goby (Signigobius biocellatus) exhibits a streamlined body that can reach a maximum adult size of approximately 3 inches (7.5 cm). Its coloration is characterized by a pale yellow to white base, adorned with two prominent dark spots located on the dorsal side, just behind the eyes, which serve as a form of camouflage against predators. This species displays sexual dimorphism, with males often exhibiting more vibrant coloration and slightly larger body sizes compared to females. Defensive adaptations include the ability to quickly burrow into the substrate, utilizing its pectoral fins for rapid movement into sandy environments. Unique morphological features include a fused pelvic fin that forms a disc-like sucker, allowing for stability on the substrate and aiding in its feeding behavior.
Behavior & temperament
The Two Spot Goby is known for its social behavior, often forming small groups or pairs within its habitat. It typically occupies the substrate level, where it can be observed darting in and out of sandy burrows. Breeding behavior involves the male performing a courtship display, which includes rapid movements and color changes to attract females. This species is generally peaceful but can exhibit territorial aggression, particularly during breeding periods. Its behavior is characterized by a constant vigilance for predators, often retreating to its burrow at the slightest disturbance.
Diet & feeding
In the wild, the Two Spot Goby primarily feeds on small benthic invertebrates, such as amphipods and copepods. In captivity, it requires a diet rich in high-quality frozen or live foods, including brine shrimp, mysis shrimp, and finely chopped seafood to thrive.
Behind the name
The scientific name 'Signigobius biocellatus' derives from Latin, where 'signi' means 'mark' or 'sign', and 'gobius' refers to 'goby', while 'biocellatus' translates to 'two spots', referencing the distinctive markings on its body.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Two Spot Goby?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.
