I caught my axie doing the wierdest thing tonight. It was using its head to scrape algae off of rocks, then as the algae was floating in the water, THE AXOLOTL ATE IT!!! At first I thought it was an accident but the axolotl didn't spit it out, it swallowed it and continued searching around the aquarium for more and when ever it found some it ate it. It continued to do it until I left, and it is possibly still doing it now, I wonder If my axie gets any kind of kick from doing this like drugs, because the behaviour was clearly very delibrate.