I bought a carpet at Petco. The tag said it was a gigantea but I am more and more certain that it is a haddoni. (I don't have a pic at the moment). It is tan but pale green when it condenses. Also the column is pale green, but no bumps or spots up high. Also, the tentacles are in rows and look more knobby and rounded rather than hairy like the gigantic. Have had it for bout a month, it's bout 6" right now at the most. Also wavy like a saddle. Need to know for sure which one it is, obviously because the 2 species require different care. Anything else make them more distinct? Oh, and lemme tell ya, there ain't no specialists at petco, they are so clueless, atleast at my location lol. Will try to upload pic as soon as I can.