OK... so now that I have Finnick, I want to make sure he's doing well, so I'd like to ask what kind of behavior indicates happy/healthy vs. stressed out!
In Finnick's case, he swims about quite a lot, and seems to like his filter - he sticks himself in the current and paddles. I don't think he dislikes it because he deliberately swims at it.
At night, he stayed fairly still near the bottom of the tank unless I walked over near him, when he would swim around again.
He flares at his reflection but not otherwise.
He's eating well; I have been doing one pellet five times daily (because I'm home and wanted to spread it out so he wouldn't get bloated) and he gobbles them up right away.
His eyes look clear, his gills don't seem swollen or anything (to me) and his fins are in good condition.
Now, to ME, he seems happy and not stressed, but what do you think?
Also, I wanted to see if anyone can tell me what type/color he might be, and how old you think he is? I got him at Petsmart and I think he is probably a veiltail. Here is a pic of him flaring at his reflection:
The spots you see are blue, not black, and I think they are a lace pattern gene rather than fin rot or anything. He has a bit more of a green cast than shows up in the photo.
Sorry for all the questions, I just want to make sure he is a happy, healthy fish!