Quick idea

[BuffaloPolypteridae]

^ +1 on that, or an erythrinus sp. Peru if you can find one. Erys are almost puffer like in how personable they are, at least mine is lol

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[Browning]

im kinda liking the red wolf idea. Just didnt think solo in a 75 gallon was enough room.

 

[Cookie*]

Native species? I hear certain sunny's can get pretty aggressive. If you're into freshwater fishing, I'm sure you could appreciate them.