Giant Snakehead or Toman or Channa micropeltes. This is one of the largest of all Channa species. But all the books put Bullseye Snakehead (Channa marulius) at the top... reaching a length of 120-122 cm This species is reported to be the largest of the family Channidae
Yeh i agree in a way, as C marulius does grow to greater length than the toman, but C marulias does not have the bulk of toman. From what ive seen C marulius is a longer slender fish, check this link for some record s/h's in thailand