I have some interesting fish behavior as well. We have a 58g in my office which I maintain. I have two precula clowns, a yellow tang, and a cleaner wrasse. The two clowns are not supposed to graze on alge, the yellow is not supposed to dig his nose in the sand, and the wrasse has a habbit of swiming up the pump return and riding down it like a slide, shooting out and banking around the rocks. I also have observed the Tang eating mysis shrimp as well as brine, and I mean acting carnivourus. The Wrasse will chase his tail for about 10 minutes or untill he gets dizzy. One precula rubs his forehead in the sand and the other eats upside-down/inverted in a alcove on the rock. So I think your maroon kissing the yellow was not near as bizzare as my wrasse using the pump return as his personal water slide. I am not kidding all of this has been happening over the last week or so. I am thinking of having the food analyzed for crack, becase this is scaring me. I really worry about what goes on when I am not in the office........