Albino Rubber Ducky Isopods (Cubaris sp.)

Take a standard Rubber Ducky, keep the round-bodied, big-eyed, duck-billed profile that made it famous, and wash most of the colour out. That is the Albino Rubber Ducky (Cubaris sp.), the pale line of the same demanding Thai complex. Where the classic morph carries warm yellow-brown tones, this one shows heavily reduced pigment, so the familiar face and body shape read almost ghostly against a light base.

These are cave animals at heart. The original Rubber Ducky turned up in the limestone karst of Thailand around 2017 and set off the wave of interest that still drives the premium isopod hobby today. The albino line inherits that whole history, along with the same evolutionary quirk: a species shaped by calcium-rich rock and stable, humid cave air. Adults reach roughly 15 to 20 mm, substantial for an isopod, and a settled colony will live for several years.

Care follows the standard Rubber Ducky playbook, and none of it is casual. Aim for 22 to 28 °C, with the mid-20s the comfortable middle; in a UK home that often means a thermostatically controlled heat mat on the side of the tub through the colder months, never underneath, where it would bake the layers they burrow into. Humidity stays high at around 70 to 85 per cent, but the aim is a gradient rather than a swamp: one damp end with a sphagnum patch, one drier end, and deep substrate holding moisture at the base. Give them at least 8 to 10 cm of substrate, deeper if you can, because these are committed burrowers that vanish for days on end, especially when moulting. Cross-ventilation through opposite walls keeps the air fresh without drying everything out.

Limestone is not optional for cave Cubaris. Crushed limestone worked through the substrate, plus cuttlebone and a few rock pieces on the surface, gives them the calcium they graze on and rely on to moult. Feeding is otherwise easygoing: leaf litter and crumbling white-rotten hardwood make up most of the diet and should always be in the tub, topped up with the odd slice of cucumber or courgette. Cubaris are hungrier for protein than most isopods, so offer a little dried shrimp, fish flake or similar once or twice a week, and clear away fresh food before it moulds. Like other armadillid isopods they can roll into a ball when startled, though a secure colony spends far more time tunnelling than hiding.

Patience is the whole game. Even by Cubaris standards the Rubber Ducky line breeds slowly, with small broods and long gaps between them, and a group can take months to settle before any young appear. The best thing you can do is leave them alone: check weekly rather than daily, resist digging to count heads, and let the colony grow on its own clock. This is not a beginner animal and not a tub for constant activity. It rewards keepers who already know their way around a Rubber Ducky setup.

If you are newer to the group, it is worth cutting your teeth on the standard Rubber Ducky before taking on the pale line, and the wider Cubaris collection shows where the albino sits among its cave-dwelling cousins. One thing to expect: pale Cubaris lines vary from animal to animal, some strikingly white, others holding a little colour, so keeping the line separate rather than mixed with standard Duckies helps hold the trait. Our colonies are captive-bred, and each order travels in carefully insulated, double-walled packaging with a live-arrival guarantee, dispatched from within the UK.

Common questions

Are Albino Rubber Duckies good for beginners? No. They want experienced hands, ideally someone who has already kept standard Rubber Duckies or another cave Cubaris.

Why do I never see them? They are deep burrowers and spend long stretches underground, particularly while moulting. Going quiet for days or weeks is normal, not a warning sign.

Will every one look pure white? No. The pale trait varies across individuals and generations, so a single colony will range from very light to lightly pigmented.