Porcellio scaber is an excellent choice for beginner keepers and bioactive enclosures. They tolerate a range of environments and come in more color morphs than any other isopod. Isolated by Roach Crossing over 10 years, ROY G BIV (also called Rainbow) are packed with color. This line has colors similar to Orin's Calico and Lava but with a uniqueness that makes them my personal favorite isopods.