I did receive them today all of them alive..They varied in size which was nice cause the bigger ones once I got them into the tank started to eat right away its fun to watch BTW. I took my time acclimating them did it for about 2 hours had my tank lights off all day so my fish were hidden and not to have an expensive snack, then turned off all my flow and one by one put them in. Some hid right away but the bigger ones got right to business.