You will receive 10+ isopods in the ad. I always put a couple more in case of any DOA. These isopods add a fun pop of color to any tank or collection with their orange-on-white patterning. Once, established, they breed quite quickly. They make a great addition to any vivarium or terrarium. We ship our isopods on Monday, Tuesdays, and Fridays to make sure that they arrive alive and well.