I just took a picture of my Green "Gigantea" today. He looks so much like a Haddoni, that I just cannot help but concluded that he is indeed most likely a hybrid between Haddoni and Gigantea. Keep in mind that is a carpet that have been in captivity for more than 11 years. Here is a picture
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My blue T. crocea next to my anemone is 11 years old in my tank.I'm torn; I love the way that these animals look, but in the wild they are negligibly senescent -- easily living for 100+ years; some may even be immortal. However, so many hobbyists keep these animals in their tanks and rarely get them to live for a year. I'm glad to see that you know what you are doing, but I am still torn at the thought of keeping these animals within captivity.