International Aquatics
Darkfin Grouper
Darkfin Grouper
🛡️ 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 Darkfin Grouper (Cephalopholis urodelus) is a semi-aggressive species that is considered reef-safe with caution. It is admired for its deep reddish-brown body, distinctive dark fins, and spotted patterns that make it a striking addition to large aquariums.
Males typically grow larger with more intense coloration and stronger finnage, while females and juveniles remain smaller and may display lighter tones. This grouper can reach about 14–16 inches in adulthood and requires a spacious aquarium of at least 180 gallons.
Its environment should include ample live rock with caves and hiding spots for shelter, along with open swimming space to accommodate its natural behavior. The species thrives in stable water conditions, with salinity between 1.020–1.025, temperatures ranging from 72–79°F, and a pH of 8.1–8.4. A secure lid is also necessary, as groupers are prone to jumping.
In terms of diet, the Darkfin Grouper is a carnivorous feeder that should be offered meaty foods such as mysis shrimp, krill, silversides, squid, and other protein-rich marine items, though high-quality carnivore pellets can also be introduced.
With proper care, this grouper becomes a hardy and visually impressive centerpiece fish, best suited for aquarists with large marine systems and suitable tankmates that are too big to be viewed as prey.
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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