You go towards the seaweed mound because at the very least, this seems the be a phenomena that you haven't seen on any planet before. Is this something specific to Shantyland? Is this something that only occurs here? What makes it occur? You crouch down to investigate it, not quite willing to poke at it in case it has some kind of religious meaning – you know better than to mess with curses and the like; it's better to play it cautious with things you don't understand.
As far as you can see, it's just a pile of seaweed. A big pile of seaweed, but just seaweed nonetheless. Your eyes had been playing tricks on you, you think. It was probably there the entire time and you just hadn't noticed it; the sounds of the swamp had been getting to you, you convince yourself. But then, before you can stand up, something bursts from the seaweed pile! It's not all that small, but you wouldn't classify it as big – it takes you longer than you would have liked to realize it looks like a rodent of some kind. It's bigger than any rodent you've ever seen in your life and the more you look at it, the more you realize that it looks like its wearing something of a grass skirt that looks oddly fashionable despite it being made out of what you think is algae. The rodent looks at you, making loud noises as it gathers up the seaweed and runs off with it.
You've found something, but you can't help but feel a little disappointed.
Oh well, you've had enough surprises for now, you've got to go do work.