It has been interesting to me to see these six pair off. They are attracted to the angel that looks most like themselves. The two blue marble angels have claimed one corner of the tank. In the video above, you could see where a blue angel comes over to see what I am doing, and they tell her to get out of their space. The blue angel has paired up with another blue angel, a very rare Siamese angel with a blue-white body and black fins. They have claimed the center of the tank. At the opposite end are two koi angels (bright orange) who have been inseparable since they were the size of nickels. Now each of these angels is at least 6 inches tall, and some are exceeding 7 inches.