Would it be tremble?
The preceding part of this pond maysteria:
“Still, I want to know what is at the bottom of the pond.”
“But how do we find out? The water is too cloudy and far too deep.”
“We can get our rods out of the barn. If we attach some extra lead with a little bit of slack just above the biggest big hook we have, then maybe we can put it on.”
“Good idea. I'll get the rods.”
Nicely described mystery.