I just purchased some on my first ever mail order buy, should be here tomorrow morning. I got em for $7.00 each......LFS would special order them in for me, but he said he had to buy a minimum of so many so I owul d have to buy 3 at a minimum, - $21.00 EACH! I have 3 in a small 2 gal pico along with a yellow clown goby that does just fine. I have at least two in every pico tank we have, and have one in a 16 gal BF to which these others will be added as they like company of their own type. At first my bi-color blenny used to pester it, but that behavior has stopped now for over 3 months. Our first ever sexy shrimp is still alive over 12 months now and they certainly have never been a problem. Its name is Lola. All our sexy shrimp are very active, and its rare yu can not readily see them, be it just hangin gout on or under a toadstool or other coral, but they sure are not shy and stay hidden like peppermints and cleaners do.