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Halfbarred Goby

Amblygobius semicinctus

A peaceful, burrowing goby that tidies sandbed detritus in calm reef systems.

Halfbarred Goby
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CC BY-SA 3.0

About

The Halfbarred Goby (Amblygobius semicinctus) is a small, unassuming fish from the sheltered lagoons and estuaries of the Indian Ocean, where it favors silty, low-energy environments over sandy or rubble-strewn bottoms. In the wild it tends to be found in pairs, hovering close to the substrate near a burrow tucked beneath rock or rubble. A monogamous lifestyle that's relatively uncommon among gobies. Its body carries the broken banding pattern typical of the Amblygobius genus, offering decent camouflage against mixed sediment. In the aquarium it behaves much the same way, spending most of its time near the bottom, sifting through sand and grazing on whatever it can find. Its natural diet spans filamentous algae, small copepods, polychaetes, and a variety of tiny crustaceans, so a tank with a mature, populated sandbed suits it well. It's a genuinely peaceful fish and mixes well with other non-aggressive species. The relatively small adult size and straightforward feeding habits make it a reasonable choice for newer saltwater keepers, provided the tank has adequate sand depth and hiding spots. If you can source a bonded pair, all the better. They tend to thrive together and are interesting to observe as they share territory around a burrow entrance.

Frequently asked questions

How big does the Halfbarred Goby get?
The Halfbarred Goby reaches about 2.5–4.5" as an adult.
What size tank does the Halfbarred Goby need?
A minimum of 20 gallons is recommended for the Halfbarred Goby.
What water parameters does the Halfbarred Goby need?
The Halfbarred Goby does best with a temperature of 72–82°F, a pH of 8–8.4.
Is the Halfbarred Goby aggressive?
The Halfbarred Goby is generally peaceful and suits a community tank with similarly calm tankmates.
What does the Halfbarred Goby eat?
The Halfbarred Goby is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
How long does the Halfbarred Goby live?
With good care, the Halfbarred Goby typically lives 5-8 years.
Is the Halfbarred Goby reef safe?
The Halfbarred Goby is generally considered reef safe.