I think that they are all commonly mistreated
Neons - Kepy with larger or aggressive tankmates, or kept 1 or 2 per tank not a school.
Betta - Kept in tiny bowls, water isnt cleaned, or kept with fin nippers
Oscars - Kept in tanks WAY to small for them
Common Plecos - Also kept in small tanks, ive seen them in tens and 20's
Piranha - People Just dont know how to take care of them. Meaning Food, Water Perameters, Tank Size
Feeder Goldfish - Kept in tiny bowls, sometimes without even a filter.
Arrowana - Kept in small tanks
Clowns - Kept in tiny tanks like 2.5 gallons since Finding nemo came out everyone wants one even if they know nothing about them. I was in my lfs one day and a lady was going to buy one and put it in with neon tetras.
Bala Sharks - Kept in small tanks
Puffers - Not kept in brackish water when most are brackish or salt
Another would be Angelfish - kept with fin nippers, Clown loaches - kept in small tanks, The worst one of all is the Glass Fish - They are horribly mistreated by painting them, also there are painted Black Phantom tetras, Tri-Color Sharks, Oscars, Gouramis, Convicts, Angelfish, Corys, Albino Mollies (Painted Pink + Blue), Albino Channel Cars, Ompoks, Just about every albino fish. It is horrible the way that fish are treated but unfortunatly theres not really anything that we could do about it
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