Not quite dbanner...
There are a few active snakeheads.
The OP's fish is one of those.
Bluenoseben, you have the Channa Pleurophthalma.
Gorgeous fish when kept right.
They are a tropical Channa, and have been known to mix OK with other fish, but nowt recommended. (I never mix my Channa with other fish)
They grow to about 50cm, sometimes less, rarely more.
They are pack hunters and shouldn't be kept alone.
Groups of 6+ are best.
They are intact, one of the most if not THE most active Channa.
As they are open water predators, they need LOTS of space.