i agree with pat. it's either a jungle or a high percentage jungle mutt... i see very little coastal in it, if any. the only thing that would lend that it may have coastal in it is that the pattern looks pretty clean, which pure jungles often times are not. usually they will get black and brown dorsal 'smudging'.
remember, it's really just here in the US that jungles bring to mind a bright yellow snake... in australia they are literally just the rain forest dwelling version of a coastal carpet python. some locales are naturally yellow, but most are not.