In the several areas I drop pots, I've encountered sand fleas...sometimes a lot of them...in my bait containers. I actually drilled bigger holes in half of my containers so they could get in. My thought was that their munching of the bait would put out more particulate and a better scent trail back to the pots. The last several trips I have not had a single one. I was wondering if they migrate or move around or if this might be a sign of a changing ecology? Just seemed odd to me that something that was very common is now seems to be totally absent. Thoughts?