PEPPERMINT PIKEHEAD (Luciophalus Aura)

Although there are a few reports of successfully co-habiting this pikehead with similarly-sized fish that enjoy the same water conditions, it really is best kept in a species tank. As well as possessing the ability to consume smaller tankmates, it’s actually quite shy and can easily become threatened if housed alongside much larger or more vigorous species. It can be kept in groups in sufficiently roomy quarters, but ensure that all the fish are of comparable size otherwise cannibalism is very likely to occur.

https://www.seriouslyfish.com/species/luciocephalus-pulcher/