yes they are. NOT a beginners fish at all. They require tons of pods, which are hard to keep a high enough supply of them for your fish. A fuge is a must imo for manderins, and even then, many people still have to suppliment pods to their systems, which is gonna be a lot of money. The only way i'd get one is if you can find one that will accept other foods, such as mysis or smethng similar.