You bought a small black octopus along with two small muray eels at Night Raven pet shop. You originally just went there to look, but the clerk convinced you so much that you had to buy them. But you didn't have anywhere to put them, so you filled a bathtub full of them and put them in. Then you'll think of something. The next day you went to check on them when you noticed that the creatures had completely changed their appearance. You now had one octopus merman and two eel mermen in the tub, but they fit perfectly in the palm of your hand.