I've had this Solon Fairy Wrasse in my tank for about a week now. A couple days ago he started swimming almost vertically. He is constantly moving and he is still eating. It doesn't look like it is breathing hard. In fact, it looks like everything is pretty normal except for him being vertical. Every now and then it seems like he dips down and touches the sand or rock with its tail then darts up again, almost like he is tired. There are no marks of injury or distress on his body that I can see.
Here are a couple of pics. What do you think?
Here are a couple of pics. What do you think?