Tri Colour Isopods (Ardentiella sp.)

Most isopods give you one colour, maybe two. This one runs all three at once: vivid red, bright yellow and deep black banded across every segment. The Tri Colour is a premium Vietnamese isopod in the genus Ardentiella, the group reclassified from Merulanella in a 2024 to 2025 revision, so the old Tricolour Merulanella tag still turns up across the trade. Same animal, same care, updated name.

The draw is that three-zone colour scheme. Each body segment carries a red, a yellow and a black band, stacked into a high-contrast pattern that few isopods come close to matching. It is a flat, fast, climbing species rather than a rounded roller, and it stays out and visible far more than most premium isopods, working the cork bark and leaf litter by day as much as by night. Intensity shifts from one animal to the next, some leaning harder into the red, others into the yellow, which makes a group worth watching rather than uniform. This is a showpiece, not a workhorse cleanup crew.

Those good looks come with a warning. The Ardentiella are a demanding group and not a beginner's isopod. They want high humidity and high ventilation at the same time, cooler temperatures than most tropicals, and clean conditions throughout, and they react badly to stale air and to sitting in their own waste. If you have kept genus-mates like Batman, Lava, Yellow Phoenix or Pastel Ardentiella, the husbandry will feel familiar; if you have not, this is a steep first step. Rewarding, but earned.

Keep the colony cool, roughly 19 to 26°C, and steer clear of heat, which stresses them quickly. Build a deep, damp, living substrate that holds high humidity, then pair it with strong airflow so the air above it never goes stale, that balance of moisture and ventilation is the whole game with this genus. Give them plenty of cork bark and a thick layer of leaf litter to climb and shelter in, keep calcium available for clean moults, and stay on top of hygiene: lift spoiling food promptly, because these are frass-sensitive animals that will not tolerate a dirty enclosure. Feed decaying leaf litter and rotting hardwood as the everyday base, with soft veg and a little protein on top. Magnolia leaves give long-lasting cover and grazing, and a springtail culture alongside them keeps mould in check in the humid, food-rich conditions this species needs.

Once a group settles, the Tri Colour breeds willingly. Females carry their eggs in a brood pouch and release live young, and the tiny mancae climb from the first day, so a secure, escape-proof lid matters as much for the babies as the adults. Give the colony a couple of months of steady temperature, cycling humidity and minimal disturbance before you expect much, and let the colour deepen over successive moults, young stock arrives paler than the mature adults it grows into. For a fuller walkthrough that carries straight across the genus, read our guide to Merulanella Red Diablo care, then browse the wider Ardentiella collection to see how the Tri Colour sits alongside its relatives.

Every Tri Colour is captive-bred and packed with care, settled into a ventilated tub of damp sphagnum inside a double-walled box for the journey. We dispatch Monday to Thursday by tracked next-day Royal Mail, aiming for delivery by 1pm, and every order is covered by our live-arrival guarantee, with a 20% overcount added to each group as standard.