This is a shelter for jumping spiders. They may not use it depending on their personality. Therefore, I've made a set of two with different hole shapes! Colors are random, so please understand. I will include the goldfish pattern if requested. I also sell large jumping spiders on Instagram. If you're interested, please take a look at the fourth photo. The benefits of the shelter include... Preventing them from building nests on the case lid, and supporting nest building for those who are not good at it. Thank you for looking.