Due to the necessary school of fish, an aquarium of 500l is recommended. Damselfish like the known Chromis viridis (chromis) are schooling fish but they are a lot more aggresive than anthias and thus form couples and mark their territories. The same applies to other damselfishes too like yellowtail damsel (Chrysiptera parasema) or Dascyllus melanurus (Blacktail-dascyllus) which are also found in nature in schools but are very less in number in the aquarium. If one has a sufficiently large tank, then it is possible to keep a school of fish, in small tanks it becomes difficult to keep pairs.
Keeping damsel fish and Anthias
"Harem or solo? It depends... "
Generally there are exceptions of ruffians in the damsel fish like pseudoanthias-species – please be informed before buying!