Do angelfish mate for life?

No, angelfish do not mate for life. In the wild, angelfish usually only pair up for one mating period. In captivity, however, they may stay with the same mating partner for a while. This is mainly due to the lack of options.

After a while, they might grow apart and choose new partners. If one of them dies, the surviving mate might hesitate to find a new partner for a while.

You’ll know a pair of angelfish is partnered up if they often swim together in a space they’ve claimed. They’ll also defend each other when other angelfish attack one of them or enter their territory.