Orange Elephant Ear Sponge

The Orange Elephant Ear Sponge (Acanthella carteri on Scleractinia) is a peaceful species that is reef-safe, admired for its vibrant orange coloration, broad ear-like shape, and unique filter-feeding behavior. Unlike fish, this sponge does not have distinct male/female differences in appearance—reproduction is usually by budding or fragmentation, though in the wild they may release reproductive cells into the water column.

They reach about 12–18 inches across when mature and should be housed in aquariums of at least 75 gallons to provide adequate space and stable water quality. Provide ample live rock for attachment, good water flow, and shaded areas since sponges often thrive in lower light conditions. Stable water parameters are essential (salinity ~1.020–1.025, temp 72–79°F, pH 8.1–8.4).

Diet should consist of phytoplankton, bacterioplankton, and dissolved organic matter carried in the water column—they rely on strong currents to filter fine particles rather than direct feeding like fish or corals. Do not expose to air, as air bubbles can damage internal structures.

With proper placement and care, this sponge makes a standout addition to reef aquariums, adding striking natural beauty and enhancing biodiversity.

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.