Rubber Ducky Isopods, scientifically known as Cubaris sp. “Rubber Ducky”, are small crustaceans that have captured the interest of invertebrate enthusiasts and pet keepers. Named for their distinctive bright yellow coloration and a facial structure resembling a miniature rubber duck, their unique appearance has contributed to their growing popularity. As detritivores, isopods play a role in their ecosystems by consuming decaying organic matter. Understanding their natural habitat provides insight into their specific care requirements.
Their Natural Home
Rubber Ducky Isopods originate from tropical Southeast Asia, found in countries like Thailand, Malaysia, and Indonesia. They inhabit dense, humid rainforests, particularly near limestone caves and karst formations. These isopods thrive on the forest floor among rich leaf litter and decaying organic materials.
Their microclimates have consistently high humidity (70-90%) and stable temperatures, typically 20-30°C (68-86°F) during the day. They prefer dark, sheltered conditions, living hidden beneath rotting wood, under logs, or within rock crevices. Their wild diet consists of decaying plant matter, fungi, and other organic debris, with limestone providing calcium. Being nocturnal, they emerge at night to forage.
Mimicking Their Environment in Captivity
Replicating the natural environment of Rubber Ducky Isopods is important for their well-being in captivity. A suitable enclosure, like a terrarium or plastic container with a secure lid, provides space. The substrate should be a rich, moisture-retaining mixture of coconut fiber, sphagnum moss, decaying hardwood, and leaf litter. Pulverized limestone in the substrate mimics their natural calcium source and aids exoskeleton development. A substrate depth of three to six inches allows for burrowing.
High humidity (70-80%) is achieved through regular misting with dechlorinated water. Adequate ventilation, via small holes, prevents stagnant air and mold. A moisture gradient, with damp and drier areas, allows isopods to regulate hydration. Enclosure temperature should be stable, typically 21-27°C (70-80°F). If household temperatures are lower, a heat mat or low-wattage lamp can maintain warmth.
Ample hiding spots, like cork bark, small logs, or flat rocks, offer secure retreats. For their diet, a base of decaying leaves (e.g., oak, magnolia) and soft wood is recommended. Supplement with specialized isopod food, dried fish flakes for protein, and calcium sources like cuttlebone or crushed eggshells for a balanced diet. Remove any uneaten fresh food promptly to prevent mold.