Ah right, well you need to get through the door behind the Slig (although I assume he's dead now). Now that the water's raised, you can swim Munch under the bridge Abe ran over early and have him in the water below the suspended platforms. Find the lever to open the door, then use Munch to Zap some Sligs up ahead - unless you're going for Archangelic Quarma
EDIT: BTW, I think you've got
far too many lines of text in your signature. With a banner, the maximum is four lines.