I was wanting to get something new for my tank. Either a starfish or urchin. Was not sure what would be better for my tank, its a 40g fowler, no sump or fug, 40lbs live rock. I was looking at a tuxedo uchin today at the lfs as well as some brittle starfish. I would rather have the urchin but have heard that they are not good additions to tanks because they eat so much alge. Anyway ant input would be great.