The Lamarck Angelfish,Genicanthus lamarck, also known as Lamarck's Angelfish is a hardy and unique angelfish species. It is sexually dimorphic with males having a bright yellow blotch on their forehead and longer and 'sharper' caudal fins. Juveniles also feature different colors and patterns with a dark body and electric blue markings.
The Lamarck Angel is peaceful but can become territorial with other angelfish species. If given plenty of hiding places and free swimming space this can be negated. They are best held in groups of a single male and multiple females in large aquariums. They should never be transported in nets as their spines can get caught and lead to damage.