Recently I noticed a small white parasite sitting in the sand in my axie's 20 gal tank. Less than 1/4 an inch long, it is white, with black tipped ends, and sort of looks like a very tiny mealworm. It plants one end in the sand, and then raises is body up straight, and stays upright. I'm hoping someone will have information about what this could be, as i have never encountered it before. I've had experience with fish and other tanks, but this is my first axolotl, and I'm worried this worm could affect him.