If I heat it up and kind of... send it out in the water, I can make something like a shock wave? It knocks the smaller ones out. I've only been able to try it on a couple of the ones near the trees, but I think with practice I could get a few at once. Easier than line-fishing, at least.
I can show you. [He's climbing carefully from the boat, reaching out to take Keith's hand to guide him along-- although, he's unknowingly reaching for the injured one.]