I posted this in another section before I saw this ID page. I picked this up at my local LFS that was going out of business and selling all of their stuff. I picked it up for $50 but I don't know what it is. Is it a digi or a cap. The polyps look like a cap to me but it grows like a digi. Regardless, I have never seen a yellow one. The pics were taken with my Galaxy 3 phone under 14k 150w MH.