New to the forum and new to fish keeping, so when I bought 8 harlequins and dropped them into my tank I noticed that 2 of them seemed to be staying closer together than the others, this evening they are up to something, lol, they are side by side and finning vigoursly, then coming together briefly and back to finning and then together etc. I know these fish are not the easiest to breed but is this possible.