I received 10 yellow shrimp and in the bag with them was some plants and some crawing greyish black very small bugs, about the sz of a fire ant, there were a few of them, sorry no pics too small and too fast to catch, does it sound like they are anything bad? I put the shrimp in their own tank by catching them with a spoon and making sure not to get any of the bugs. does anyone have an idea on what they could be?