I have 6 WS tetras, 6 head/tail light tetras, 6 scissortails, 2 cory cats, 37 gal
tank. 2 mos old. 78.2F, fully cycled Am 0 Nitrites 0 Nitrates 10.
The WS tetras only schooled for about the first 3 days and then scattered around. They will chase another WS away if one gets close to another and usually always swimming. Today i noticed that 2 of them are not swimming (1 on each side of the tank) Their heads are pointing upwards and just hover. 2 other WS will get close to one of them and stay side by side and the hovering one will try to run but the persuer will run to stay by it's side. (no nipping that i can see). If the hovering one leaves the area they are in and the persuer is not near, the persuer will corral it back to the area it left. If the 2 persuers get close to each other it looks like they are trying to nip each other. I noticed that the persuers will stay just to the side and toward the middle of the hovering fish.
I cant tell any diff in the fishes shapes, they all 6 look the same. one pair the persuer is smaller and the other it is larger.
Would i be correct in assuming that they are trying to mate or would ir be more of an agression thing. The WS's do not seem to be aggressive toward any of the scissors nor head/tails.
Thank you for your time.