The Lamprey is an animal added to the game on 4 - 06 - 17. It was added with three other new creatures in the same update. The lamprey is the evolved version of the worm. It has a unique feature that no other creature in the game can do. It can latch on to animals (seagull or bigger) and can absorb some of the food that the animal eats. It takes 7k xp to evolve into the next creature, the jellyfish.