Blue Spotted Sea Hare

The Blue Spotted Sea Hare (Bursatella leachii) is a peaceful species that is reef-safe, admired for its striking blue spots, mottled body patterns, and unique sea hare appearance. Unlike many marine invertebrates, it is sought after for its natural algae-grazing ability, making it both beautiful and functional in a reef system.

Males typically resemble females, as this species is a simultaneous hermaphrodite with no distinct external sexual dimorphism. Juveniles are generally smaller and lighter in coloration, developing more vivid spotting as they mature.

They reach about 12 inches in length and should be housed in aquariums of at least 75 gallons. Provide a sandy substrate with ample live rock and hiding spots, along with stable water parameters (salinity ~1.020–1.025, temp ~72–79°F, pH ~8.1–8.4). A secure lid is essential, as sea hares may crawl or climb out of tanks if stressed.

Diet should consist primarily of filamentous algae, hair algae, and other natural microalgae sources. Supplemental feeding with dried seaweed (nori) or specialized herbivore preparations can be offered if natural algae growth is insufficient. With proper care, this fascinating invertebrate makes a standout addition to the aquarium, helping maintain algae control while adding unique visual interest.

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.