There's a lot of variation when it comes to WAL coloration, and you might have a color morph WAL. It definitely has an interesting pattern & coloration.
King-eL would be the one to consult on this matter as he knows a lot about the various variations of lungfish coloration.
Some WALs can be calmer than others, but they all tend to snap after a while and kill off their tankmates.
If you compare those pictures to the ones of SALs and other lungfishes on Primitivefishes.com, you'll see that there are a few morphological characters that set it apart from SALs.
The coloration is pretty weird, but everything else points to it being a WAL. I would keep it for a little bit to see if the coloration changes at all; I know that the blue piebald ones that King-eL has started out as a different color then changed over time to what they are now.