Watermelon Bulb Anemone

The Watermelon Bulb Anemone (Entacmaea quadricolor) is a semi-aggressive species that is reef-safe with caution, admired for its vivid watermelon-like coloration, bulbous tentacles, and moderate size, making it a visually striking centerpiece in marine aquariums.

Males typically display larger, more robust tentacles and may host multiple clownfish, while females/juveniles tend to be smaller, with shorter tentacles and subtler coloration.

They reach about 8–12 inches in diameter and should be housed in aquariums of at least 30–50 gallons, depending on the number of inhabitants. Provide a combination of sandbed, live rock for attachment, hiding spots, and open swimming space to allow natural behavior. Maintain stable water parameters with salinity around 1.020–1.025, temperature 72–79°F, and pH 8.1–8.4, and ensure a secure lid since anemones can occasionally move or “jump.”

Diet should consist of meaty foods like mysis shrimp, brine shrimp, chopped seafood, and occasional pellets, though they also benefit from the presence of symbiotic algae for supplemental nutrition. With proper care, the Watermelon Bulb Anemone becomes a dynamic and colorful addition to any marine reef setup.

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.