There are a lot of different urchins out there, some more well known than others (looking at you tuxedo urchins). What is your favorite species? I really like the Blue Spot urchin, which also goes by fire urchin, red urchin, rainbow urchin but it's scientific name is Astropyga radiata. Their sting is a bit more painful then most urchins but the colors they have are so pretty I think it's worth it to keep them.
