Name that one fish that you totally regret getting...

Dont have one because I look up all my fish beforehand. Almost bought painted fish as a newbie but the day I was going to buy them I read in a book that they were injected with dye so I didnt get them. That is about all.
 
GBR: Bought three, one was sucked up filter intake because I forgot to put on the cover, other two died of ammonia poisoning because my test kit read zero when it was actually off the chart...
 
My common pleco. I've had him for a few years now not realizing how big and destructive with plants they can be. I thought (at the time) you needed them as algae eaters. He's been pretty good lately, but He's getting bigger and bigger. I wanted to get rid of him to, but can't seem to since he's been in the tank the longest. Him and the blue gourami.
 
A molly... Poop machine, ate a guppy, and wasn't pretty at all... I will always hate mollies.
 
a pacu in a 20g tank & a baby whale as tank mate to a red tiger oscar
 
Mine would probably be an iridescent shark and the silver dollars I had.
 
An australian rainbow that went feral and managed to massacre 10 other fish before I figured out the culprit.
 
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