We manage to keep them alive in a cooler for about four hours. As noted, don't submerge them in water. Let them breath normal air, we prop the door open. And also as noted above, keep them cool. we usually wet a towel with salt water and ring it out over them. I also think they last longer when right side up vs upside down but I could be wrong about that. We did fine in MA 10 over the last few days. Not 'great' like some past openers but consistent with about a 2.5 keeper per pot. Not many lunkers, maybe just 2 or 3 all weekend. Shallower pots did better--probably because of the big tidal exchange. For the first time, I saw several really tiny little baby crabs on the edge of our boat and gear (multiple days, but mostly same area)--like pencil eraser size (smaller than the crabs on the beach that come out from under rocks). Anyone else see those tiny crab?