Geoduck are like old growth trees.

It takes a long time to grow a big one
Sure the divers can harvest them and they will grow back, but what replaces them will not be the giants that they're getting now.

I'm sure that grandpa is right in that in the future we will look back on the situation with the geoducks and say why didn't we stop it.

Just like all the clearcutting of the old growth and concomitant destruction of salmon habitat . . .
_________________________
Dig Deep!