the green brittle star is med. in size whatever that meens i guess,not huge anyway, not known for being fish safe but the issue is with small fish that sleep in the rocks like cromis and some wrasses, any med-large or active fish are fine. $10
http://image50.webshots.com/50/3/26/...4gAHzJF_fs.jpg
the urchin is a purple urchin, even though its not really purple just kinda dark colored, hides all day eats algae all night what else would you want from an urchin, $10
looks like this minus the nice purple
http://k43.pbase.com/o2/18/442518/1/...rchin_5297.jpg