I'm interested in taking advantage of the delicious, invasive and underutilized crawfish here in Minnesota. I recently purchased several minnow traps (they look like two metal mesh cones placed together) but once receiving them I noticed the entry holes seems pretty small (approximately 1" diameter). It would seem crawfish can get larger than this, I'm wondering if I should return them and try to find traps with a larger entry hole. What is the optimal range for this opening?
(I've checked with state regulations and there is not explicit size range, so I'm looking for the optimal size for catching medium to large crawdads, so basically can a large crayfish fit through a 1" opening?)