Temensis Peacock Bass (Cichla temensis) Sizes:5 inches (Wild) and even robust and assertive

and even robust and assertive species of cichlids could work

Heros Severum originates from the far upper reaches of the Rio Negro in Colombia

Its common name in Australia is the Three-spined Frogfish

Avoid: Other arowanas

Use caution: Even sizable fish may be eaten if they can fit in the mouth

Temensis Peacock Bass (Cichla temensis) Sizes:5 inches (Wild) and even robust and assertiveTemensis Peacock Bass (Cichla temensis) is the largest member of the peacock bass genus and is a top level predator in their native South American river habitat. They are most often found in slow moving or still water environments like lagoons, backwaters and shoreline pockets. While Temensis Peacock Bass spend a good portion of their time in calm waters, they will readily move out into faster waters to feed and to ward off potential competitors.