Rubber Ducky Cubaris sp.
The internet-famous 'duck face' isopod — instantly recognizable, endlessly charming.
Overview
Cubaris sp. 'Rubber Ducky' is possibly the most famous isopod in the world, having gone viral for its bright yellow coloration and face that resembles a rubber duck. Native to limestone caves in Thailand, it requires the high humidity of a cave environment and is one of the more demanding Cubaris — but endlessly rewarding to keep.
Habitat & Setup
Substrate mix: For best results, use Isopod Paradise Organic Substrate specifically formulated to support healthy colonies. If you would rather mix your own, we recommend a blend of 70% organic topsoil, 10% flake soil, 10% milled sphagnum moss, 8% organics(mushroom compost, earthworm castings and leaf litter) and 2% calcium
Hides & decor: Bark tubes and flats, leaf litter layer, moss patches, coco huts, lotus pods. Cuttlebone for calcium source.
Moisture: High gradient moisture — damp substrate 70/30 gradient. Mist weekly.
Diet & Feeding
Varied diet. Carotenoid-rich foods (carrot, sweet potato, shrimp) support the yellow coloration. Calcium is critical.
✓ Feed These
- Leaf litter (essential)
- Carrot, sweet potato (carotenoid-rich — key for yellow)
- Dried shrimp, fish flakes
- Powder formulas like Isopod Chow, Repashy Morning Wood, Bug Burger, etc.
- Mushroom pieces
Feeding frequency: Rotate foods on a weekly basis. Remove leftover food when food begins to mold.
Breeding & Lifecycle
Slow breeder but one of the most rewarding in the hobby to establish. Babies are tiny and require extremely stable conditions.
Mancae care: Juvenile Rubber Duckies are tiny and fragile. Springtails are essential. Ensure consistent high humidity and fine food particles at substrate level.
Colony tips: Simulate a cave: dark, humid, undisturbed, with minimal ventilation. Rubber Ducky thrives when you mimic its native limestone cave environment as closely as possible.
Cubaris sp. 'Rubber Ducky' went viral in 2020 when photos of its duck-like face spread across social media — sparking a worldwide craze for isopod keeping.