The tuxedo is Mesphillia sp., M. globulus I think, the "pincushions are usually Caribbean [i\]Diadema spp.[/i], although I am sure that there are some Indonesian spp. as well, I just dont see many of them being imported due to the problems associated with their shipping (my opinion). Although the Diadema spp. are great for cleaning the junk of new live rock and rocks covered with filamentatious algae, they are bad about pushing over loose corals and occasionally dislodging fixed specimens. I am not so sure that I didn't just lose a Heniochus spp butterflyfish to an accidental spining as well. Very kewl echinoderms, fascinating to watch, kids love them ("sweetie, keep yer hands out of the tank..."), and the grow quickly (an advantage???). If you're thinking about breeding Pajama cardinals or any of the Bangai cardinaols, these make great hosts for the newly ejected fry to protect them from the parents.uurt said:Does anybody know anything about pin cushion urchins?