Aggressive Lemon Tetra

[Zac]

So I’ve had these 5 lemon tetras for about a month now and I see this ongoing issue. There is 1 that will terrorize the other 4 for about a day or so, and then stop for about a week or so. They’re in a 29 gallon with 4 Pygmy corys, 8 ember tetras, 7 blue king tetras, 2 cockatoo cichlids, and 1 clown pleco. Tanks not overstocked but it is at about max. I’m guessing it’s possibly mating behavior because the fish doesn’t nip, but rather rubs itself up against the others (it is a male). Any other thoughts on this behavior and if I should do something about it even though it doesn’t happen that much?

[Colu]

If it's rubbing against the other lemon tetras when doing this it's more than likely breed behaviour and nothing to worry about