Natural History Food Isopods are omnivores or scavengers feeding on dead or decaying plants or animals. Some may eat live plants. Habitat Isopods breathe with gills, so they are restricted to areas with high humidity, under rocks or logs, in leaf litter or in crevices. Some species are nocturnal. Predators Vertebrates and invertebrates.
Some species roll up into a ball when disturbed.
Juveniles look like adults and are soon liberated from pouch. Molting is in two stages. First the back half molts, then two to three days later, the front half molts. Coloration of both halves may be different at this time. Many species are fast walkers, but can be easily observed when held in the palm of the hand.