Isopods, often referred to as "roly-polies" or "pill bugs," are small terrestrial crustaceans that have recently captured the attention of exotic pet enthusiasts around the world. Though traditionally known as simple decomposers in gardens or forests, isopods have found a new role-becoming low-maintenance, fascinating pets kept in terrariums or bioactive enclosures.
What Are Isopods?Isopods are part of the order Isopoda, which includes both aquatic and terrestrial species. The terrestrial types-known as "woodlice"-are the ones most commonly kept as pets. These creatures have segmented bodies, jointed limbs, and a hard exoskeleton that protects them from predators and desiccation. They come in a variety of sizes, colors, and textures, depending on the species.
Unlike insects, isopods are crustaceans, making them closer relatives to shrimp and crabs than to ants or beetles. This gives them unique biological traits such as molting in two stages and breathing through gill-like structures called pleopods, which require humid environments to function.
The History of Isopods in CaptivityKeeping isopods in captivity is not entirely new. For decades, they have been used in scientific research and as feeder or "clean-up crew" organisms in terrariums with reptiles and amphibians. In the past, their primary purpose was utilitarian-they broke down waste, mold, and decaying organic matter in vivariums.
However, over the last decade, interest in isopods as standalone pets has grown rapidly. Hobbyists began noticing their unique behaviors, color variations, and ecological roles. Breeders started to isolate and propagate rare morphs and species, leading to the birth of a niche but rapidly growing isopod-keeping community.
Social media platforms, exotic pet forums, and online marketplaces contributed to their popularity by showcasing vibrant species like Porcellio laevis "Dairy Cow," Cubaris "Rubber Ducky," and Armadillidium vulgare morphs. These species stood out due to their striking appearances and quirky movement, captivating both beginner and experienced pet keepers.
Why Are Isopods Becoming Popular Pets?Several key factors contribute to the increasing popularity of isopods:
For many hobbyists, isopods serve as a "gateway" to exploring more complex or exotic invertebrates. Their low risk, affordability, and intriguing behaviors make them a perfect entry-level species. Keeping isopods teaches owners about environmental balance, species-specific care, and the hidden diversity of the animal kingdom.