Hey i just found this cool guys in the shop very cheap only 7.50 euro each ! im not sure how the Red will react but im willing to give it a try i got no idea what species they are tho, i got 2 of them anyway. He didnt know what they were called in the shop marked as "Chinese snakeheads".
heres another pic of one of thems body, i kinda suck with the camera sorry if its bad, can also add theyr about same size , one is slightly bigger almost as big as the TSN around 17-20cm maybe
posted before fully reading the part about "chinese" snakehead. probably asiatica then which means it won't get along very well with your micro as they prefer two different temps. micropeltes=tropical & asiatica=subtropical