Gentlepeoples of Reef2Reef, I have these tube worms and never paid any attention to them for years and years. The tubes are brown colored, very small (about 4 mm long), with fronds or tentacles that are brown in white light. I recently switched over to predominantly blue LED, and found the tentacles fluoresce green. Well now I'm curious about them, what is its name? Reproduction? Feeding needs (obviously since I've never specifically fed them, they must get bits from the water)? I guess they must be photosynthetic as well, given that they fluoresce? In this light (white + blue LED), the fronds show the green tint. They came on some live rock.