Recommendations for mid-size predator fish

[nicklimzhiwe]

As the title suggested.. Im looking for a stunning predator fish with max adult size of about 30cm.. Tropical fish perfered.. Hopefully no need for chiller.. New to predators.. Please help.. Thanks!

[lucasjiang]

You can try dwarf snakeheads, all very colourful, but max size smaller than 30 cm.. I think there are many cichlids eg oscar that also meet your requirements.