The Black Blenny is commonly referred to as the Black Sailfin Blenny, Dusky Blenny, Brown Coral Blenny, Black Blenny, Highfin Blenny, or Brown Combtooth Blenny. With its stark black coloration, it shows a unique appearance and makes a captivating addition n any tank. The Black Blenny requires a tank with plenty of live rocks that encourages the growth of algae on which it can feed in-between, and to perch upon. Being an obligate microalgae eater, the Black Blenny mainly feeds on the diet that contains vegetable matter, including frozen and dried foods containing marine and blue-green algae (spirulina). The Black Blenny grows up to 4 inches, and needs to be kept in a tank not less than 30 gallon. The Black Blenny loves to take refuge in the caves and crevices found in the aquarium, so make sure to offer them a variety of such locations. The Black Blenny is peaceful towards tank mates of similar size and temperament, but may nip over the small polyp stony corals and clam mantles. The Black Blenny may turn aggressive or belligerent towards its own species. If you are thinking to acclimatize more than one, then do it simultaneously not at an interval. Males are generally larger than females and on breeding it experience a succession of color changes. The Black Blenny thrives well in a temperature range of 72-78 degrees Fahrenheit and pH of 8.1-8.4. The Black Blenny is peaceful in nature and should not be kept with predatory fishes. The Black Blenny is moderate to care for, and makes a good choice for a moderate user.