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

Red Wolf Fish. Attacked anything and everything, including a 12" Oscar.(The Wolf was only 4") It died soon after it jumped at the cover of the tank, and hit too hard...
 
Mine would be my 2inch Tiger Oscar. Ive put 6 differant fish that the Petsmart Guy told me would be fine with him. All of them have died within one night each time i added a new one. Even another oscar that was larger than he was. Eventually i assumed the guy was lying to me and i asked my dad about it and he freaked out telling me that oscars are really individual and dont get along with much anything. but i did find a Pleco that he enjoys very much, thank god. lol
 
Greenside darter Etheostoma Blennioides I've tried several times to keep them but they just end up washed out looking, emaciated and skittish while my other darters were doing great.
 
i got this platinum gourami when i cycled my tank
in the store i was debating on the plat or the pearls
they only had one plat left so i figured ide get a pearl later and well . . . i did and the plat bit off all his fins
that plat killed a total of 3 other gouramis the same way by biting off thair fins and just watching them die
he also killed 2 african butterfly fish
2 cory cats
an angel fish
a ram cichlid
a kuhli loach
and probably more that i cant think of right now
 
I'm really starting to regret my multis. Everyone told me they are really interesting and do a lot of cool behaviors. All they do is hover above their shells and stare at me. Even if I sit really still, they still rarely swim around. I'm thinking about selling them and letting the calvus(1") have the whole tank.
 
I would love to keep a dwarf gourami, but I've tried twice, and both times I lost them to a wasting disease that I couldn't cure. Same thing with my peacock gudgeon, but that wasn't a disease, I just didn't realize how hard it would be to feed one in a community setting. I want to try them again in their own species tank, with blackworms living in the substrate.

If you have sand, try letting blackworms live in the sand. It makes it much easier to get food to creatures who are normally hard to feed in a community tank. If I had known about that, I think my peacock gudgeon would have survived.

Right now I am keeping African dwarf frogs in a community tank with rainbowfish. Normally the rainbows would eat all the food before the frogs even knew what was going on, but with a constant supply of worms in the substrate, my frogs are gloriously fat.
 
the pleco that barked (then died) besides that only thing i can think of was many years ago when i was about 15 my mom "surprised" me with a new fish while i was at school. new fish was a rather large catfish, and i came home to find my betta pair and a whole school of tetras missing.next day the guppies and an algae eater were gone. in a few days i had just a catfish :'(
 
AquariaCentral.com