Scavenger Hunt Riddles

What is a good scavenger hunt riddles for an aquarium?
I have a scavenger hunt for teenagers and could use some help .. with a Evidence for them
come seek us where are voices sound. We can not speak on the floor. one hour, you have to look for. to Discover what we have.]] Or something like that.
Riddle Me Treasure and SCAVENGER HUNT Clue Software


















