crustaceans belonging to the order Isopoda (includes the gnathid isopods, some of which are ectoparasites on coral reef fishes), most of which are quite small (less than 1.5 cm [0.5 in.]). Found on http://www.encyclo.co.uk/local/20126
members of an order of small crustaceans whose bodies have seven pairs of legs; includes the pillbugs and sowbugs Found on https://www.encyclo.co.uk/local/22348