scp - 3 0 0 0 is a massive, aquatic, serpentine entity strongly resembling a giant moray eel ( gymnothorax javanicus ). the full length of scp - 3 0 0 0 is impossible to determine, but is hypothesized to be between 6 0 0 and 9 0 0 kilometers. the head of scp - 3 0 0 0 measures roughly 2. 5 m in