08-17-2009, 12:32 PM
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They don't lock lips, they are just "bumping" lips repeatedly. They face each other, then "charge" until they bump lips. They repeat this several times until one seems to 'give up' and swim a short distance away. I have seen them do this several times throughout the day.
They seem to have reddish throats and somewhat long anal and dorsal fins (although I have nothing which I can immediately compare them to). They are presumably the same gender.
If I was going to hazard a guess, I would say it's a dominance thing. They don't seem to really hurt each other, just chase the one out of the others' space, and they aren't doing it 24/7. Most of the time they co-exist peacefully just as they have for the last 9 months or so.
I don't currently have a decent camera, hopefully soon I can get one and get a video of them doing it. Thanks again for your help. :)
Last edited by crackback; 08-17-2009 at 12:40 PM..