Interesting post on gobies. We have been fishing the Thousand Islands area for quite a few years now and at first would be catching quite a lot of them. We have been gradually catching less and we just got back from a weeks vacation there and didn't catch any. The bass, pike and perch have now been feeding heavily on them. They must still be around but I have only seen them in fish that we decide to keep and find them in the stomachs.
I have had worms in the fridge for several months but they were super fresh when bought. I check on them every couple of weeks and if some are dead then get rid of the dead ones. I add a little bit of water if soil looks dry.