Triops can grow pretty big. Some Triops have been measured at 11cm (4inches) in the wild (we don't include their long tails when measuring their length)! Typically you can get them to grow 6-8cm (2-3inches) in length in a tank. Triops cancriformis species grows the biggest. Triops owners like taking pictures of their wee creatures. See the Gallery section of pictures and movies of their pets.