Fish depression

Question
Hi my name is Gary and I own a cat fish named Steve. I think
Steve is depressed as he does not swim around much and keeps
a blank expression. I took him to the post office and used
their scale to weigh him, he weighs a little over 13oz's.
The reason I weighed him is I am trying to figure out a
ratio of body weight to Prozac ratio. Before I put Steve on
a anti depressant I am asking around to some experts like
your self about if there is any fish anti depressants made
for fish already? If so great! I am going to have to fake
depression to my Doctor so I can get Steve meds.

-Gary

Answer
Hi,
It's fantastic you care so much about your fish.
Most catfish that get that size are ether ambush predators or normally nocturnal. I would be he is not depressed, and the medication has the potential to hurt him.
I have a few catfish like him, 2 act just like Steve is, and one of my catfish species has even evolved to play dead so its prey comes up to it, and then it eats them.

If this is new behavior, it is because catfish can take years to get used to a tank, and this is a sign he's used to it and feels safe in his home.

Just some general tips if you don't mind, make sure he has plenty of places to hide during the day, and make sure the light isn't too bright.