International Aquatics
Blue Fin Watchman Goby
Blue Fin Watchman Goby
🛡️ International Aquatics Quarantine & Guarantee
All fish are checked by marine vets, given a formalin bath, and held for 14 days in copper-treated systems. We feed Selcon-soaked food with Kanaplex and Metroplex during quarantine. Unless marked, all livestock comes with our 15-Day Guarantee. You will receive a video of your fish eating before shipment. For size preference please add a note on your order and we will match your fish to your requested size. If you just want the fish without our QT process, Please email us directly with your order number. Please note this does waive the 15 day guarantee.
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The Blue Fin Watchman Goby (Cryptocentrus fasciatus) is a peaceful species that is reef-safe, admired for its bold banded body pattern, striking blue fins, and fascinating symbiotic relationship with pistol shrimp. This goby not only adds vibrant color to the aquarium but also helps aerate the substrate through its burrow-digging behavior.
Males typically grow slightly larger and display more vivid fin coloration, sometimes showing dominant behaviors when guarding a burrow. Females and juveniles remain smaller with subtler coloration and are generally less territorial.
They reach about 4–5 inches in length and should be housed in aquariums of at least 30 gallons. Provide a fine sandbed for burrowing, stable live rock structures with caves and hiding spots, and open areas for swimming. A secure lid is essential, as these gobies are known jumpers. Stable water conditions are necessary, with salinity around 1.020–1.025, temperature between 72–79°F, and pH between 8.1–8.4.
Their diet should consist of mysis shrimp, enriched brine shrimp, copepods, finely chopped meaty foods, and high-quality sinking pellets. Supplemental live microfauna within the sandbed is highly beneficial to their health and natural feeding behavior.
With proper care, the Blue Fin Watchman Goby makes a standout addition to reef aquariums, bringing both beauty and unique personality through its symbiotic behaviors and striking appearance.
International Aquatics Quarantine & Guarantee: All fish are checked by marine vets, given a formalin bath, and held for 14 days in copper-treated systems. We feed Selcon-soaked food with Kanaplex and Metroplex during quarantine. Unless marked, all livestock comes with our 15-Day Guarantee. You will receive a video of your fish eating before shipment. On request, we also send photos/videos after arrival at IA. Some species are import-to-order (3-10 business days). Many common species are already cleared or near the end of QT.
Several species will be import-to-order and may take anywhere from 3-10 business days to secure. Once your fish is secured, you will be notified, and the quarantine process will then begin.
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