How to Keep Cubaris Amber Ducky Isopods

Cubaris Amber Ducky isopods (Cubaris sp. 'Amber') are a warm gold-and-orange relative of the famous Rubber Ducky, from the tropical forests of Southeast Asia. They need a warm, humid enclosure (around 21–27°C) with deep, moisture-retaining substrate, a humid-to-drier gradient, good airflow and a steady calcium source. The single most important rule with this species is moist, not wet: Amber Duckies tolerate a slightly damp setup far better than a soaking one, and over-wet, stagnant conditions are the usual cause of losses. This guide covers the full setup, feeding, breeding and the common mistakes to avoid.

The good news for newer keepers is that Amber Duckies are widely considered one of the easier Cubaris to keep — a popular stepping stone from hardy beginner species toward the more demanding morphs. If you've kept something like Dairy Cows and want to try your first Cubaris, this is a sensible choice. You can see ours on the Amber Ducky product page.

What Are Cubaris Amber Ducky Isopods?

Amber Ducky is a trade name for a Cubaris species (family Armadillidae) from the warm, humid forests of Thailand and neighbouring parts of Southeast Asia. They're close relatives of the Rubber Ducky, sharing the same rounded "duck face" shape but in soft, translucent gold-and-amber tones rather than the Rubber Ducky's darker body. They're a small, dwarf-type Cubaris, reaching around 2 cm, and like the rest of the genus they're nocturnal, fairly shy and roll into a tight ball (conglobation) when disturbed.

Stock in the hobby is captive-bred, and colonies are usually sold as a mix of juveniles and sub-adults to give a breeding group a good start, so don't expect every animal to arrive fully grown.

How Do You Set Up an Amber Ducky Enclosure?

A ventilated tub or glass enclosure with a secure lid works well, sized to the colony with room to grow. Three things matter most: deep substrate, a humidity gradient, and steady warmth.

For substrate, use a moisture-retaining blend — coconut fibre or organic topsoil for structure, sphagnum moss for humidity, and plenty of decaying hardwood and leaf litter for food and burrowing. Make it deep (a good 5–6 cm or more), as Amber Duckies like to dig and will breed down in the substrate. Top it with a generous layer of leaf litter and add cork bark or similar hides to give them the dark, secure spaces they prefer.

Keep the enclosure warm at around 21–27°C — a little above typical UK room temperature, so in a cool home gentle background heat (a low-wattage mat against one side, ideally on a thermostat) is often useful. Avoid placing a heat source so it bakes the whole enclosure or dries it out; a gradient where one side is slightly warmer lets the colony choose. Skip bright, direct light, which they dislike.

How Much Humidity Do Amber Duckies Need?

This is where most Amber Ducky problems start, so it's worth getting right. They need humidity, but the goal is moist, not wet, with a gradient rather than a uniformly soaking box. A good approach is to keep roughly half the enclosure damp (moist sphagnum, regular light misting) and let the other half stay slightly drier, so the isopods can move to the level that suits them.

Just as important is ventilation. Amber Duckies need humid conditions but not stagnant air — cross-ventilation from small holes on opposite sides keeps the air fresh without dropping humidity too far. The combination to avoid is high moisture plus poor airflow, which leads to the moulting problems and sudden die-offs Cubaris are prone to. If in doubt, err slightly drier and better-ventilated rather than wetter. There's no need for a standing water dish; it adds drowning and fouling risk without benefit.

What Do Cubaris Amber Ducky Isopods Eat?

Like all isopods, they're detritivores, so the staple is decaying plant matter — leaf litter and soft white rotten wood — which should always be available. Around that base, offer:

Vegetables. Small amounts of carrot, cucumber, squash or similar, removed before they mould.
Protein. A little fish flake, dried shrimp or similar a couple of times a week. Cubaris benefit from regular protein for growth and breeding, but offer it sparingly to avoid fouling and mites.
Calcium. A permanent source such as cuttlebone, limestone or crushed eggshell, which the calcified exoskeleton needs for healthy moulting. Limestone suits Cubaris particularly well, as many come from limestone-rich habitats.

That's the whole diet: a permanent base of leaf litter and wood, a constant calcium source, and modest protein and veg on rotation.

How Do Amber Ducky Isopods Breed?

Amber Duckies breed readily for a Cubaris, which is part of why they make a good first one — give them deep substrate, stable warmth and humidity, and a calm, undisturbed colony, and they'll establish without special intervention. Like all isopods they reproduce sexually: the female carries fertilised eggs in a brood pouch (marsupium) on her underside until the young emerge as tiny mancae, miniature versions of the adults.

To encourage a colony along, keep conditions steady, provide consistent calcium and a little protein, and resist the urge to dig around — Cubaris do best when left alone to settle. Starting with a reasonable mixed-age group rather than a pair gives a far better chance of a self-sustaining population. Growth is steady rather than fast, so building up numbers is a patient process measured in months.

Common Problems and How to Avoid Them

Most Amber Ducky losses trace back to a handful of avoidable issues. Over-wet, stagnant conditions are the big one — covered above, and solved by a moisture gradient plus cross-ventilation. The next is too little calcium, which shows up as failed or difficult moults; a permanent calcium source prevents it. Overfeeding fresh food causes mould and grain-mite blooms, so feed modestly and remove leftovers. And starting with too few animals, or disturbing them constantly, stalls a colony before it establishes — begin with a proper group and let them be. Get warmth, humidity balance and calcium right, and Amber Duckies are an undemanding, rewarding colony.

Frequently Asked Questions

Are Amber Ducky isopods good for beginners?

They're one of the more beginner-friendly Cubaris and a popular stepping stone from hardy species like Dairy Cows toward demanding morphs. The care is straightforward, but mistakes — especially over-watering — are costly, so stable conditions matter.

What temperature and humidity do Cubaris Amber Duckies need?

Around 21–27°C, kept moist but not wet with a humidity gradient (roughly half damp, half slightly drier) and good cross-ventilation. They prefer it a little warmer than typical room temperature.

Where do Amber Ducky isopods come from?

They're a tropical Cubaris species from the forests of Thailand and neighbouring parts of Southeast Asia, and relatives of the Rubber Ducky. Hobby stock is captive-bred.

How big do Amber Ducky isopods get?

They're a small, dwarf-type Cubaris, reaching around 2 cm when fully grown.

Why do my Cubaris keep dying?

The most common cause with Amber Duckies is conditions that are too wet with poor airflow, which triggers moulting problems and sudden die-offs. Keep the enclosure moist rather than soaking, add cross-ventilation, and make sure a calcium source is always available.