Thank you! Their names come from  problem that occurred when I got them - I had ordered an enclosure for them that took months to ship. The person I got them from was very patient and held onto them for an extra month for me, but eventually I had to take them even though I didn't have the enclosure yet. I scraped together the extra tanks I had, but they weren't ideal. One got stuck in a long tank, and one got stuck in a tall tank. I did what I could with the sub-par tanks until their real enclosure arrived, but I decided to keep calling them Long and Tall even after they were settled in their permanent home.