Broncofish, nope not talking about the bubble algae. The thing below the algae, half on the substrate and half on the rock. Light tan in color. It moves around, doesn't swim but most across the gravel or rocks. It is lonley the second time I have seen it and both times the lights were out for a couple of hours.
Bang Guy, I sent an email of the uncompressed picture.
I don't think it is a cucumber as it is flat. I have not seen a cucumber in an aquarium so I don't know but I think they have more of a cylinder/rounded shape (looking at pics). Thanks for the help though.