Hi! So....some background info on my tank. It's a 10 gallon and I have 2 inch-ish black moor in it (yes I know it is small, I am upgrading soon, promise, and am RELIGIOUS about keeping ammonia levels down...Using a bacterial additive and an ammonia neutralizer, daily testing, bi-weekly filter changes, and weekly water changes for now. Our 55 gallon died on me, and this is what we could afford. She's still tiny at least!) We got a comet goldfish today who, with his tail is probably close to 4 inches or so....2 inches without tail. Space wise they have plenty of room, and there's multiple hidey holes and planted areas if they want their own space. We floated the comet and got him all acclimated and put him in. Normally we wouldn't put a fast moving goldie like that in there, but this one's a big baby. He was shy to eat in his tank at the store and and wasn't as active in chasing as some of the surprisingly more aggressive goldies in there were. He has a tiny chunk missing from his tail where the others had picked on him. Blame it on my feminine sensibilities, but I just HAD to rescue him from the other big bad fishies. Not to mention he is BEAUTIFUL! Well anyways, I put him in and my DEFINITELY female black moor is ALL OVER him (or her, I guess...the comet isn't showing any gender signs that I can find, I don't think he's mature yet. I'm thinking with his tail, he's probably male?)! She would swim right next to him or behind him, and put make little fish kissy faces on his sides and chase him around the tank a bit, but HAS NOT ONCE NIPPED AT A FIN OR ATTEMPTED TO. I repeat, she has NOT ONCE NIPPED AT HIM! After about an hour and a half now of watching them, she hasn't been as clingy as she was, but if they are more than half the tank apart, she swims right over to him again! I thought at first it was because of the small tank size, and that maybe it was territorial, but she's not being aggressive really, just annoying the crap out of him. Like I said, he's a little shy. Are they just friends and playing? Is it territorial, or something to do with mating? I've tried looking this up, but the only thing I can find is Comets chasing Moors, or distinctly territorial issues.