We have 2 tiger barbs in a freshwater aquarium with other fish. We think they have babies, but aren't sure. One of them like guards the other one that is inside of a hiding place, we can't see inside.Do they protect their young that way?
No they are egg scatters... it sounds to me like its territorial aggression, which is probably due to only having a pair. In larger numbers, they tend not to pick out a single fish (like pairs or trios) so if you have more room in the tank, consider getting 4-5 (plus! They do great in schools above 20 individuals) to ease the aggression on the victim.
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