Amber Firefly Isopods (Cubaris sp.)

Warm amber is a colour you rarely see in the Cubaris genus, which is most of the appeal of the Amber Firefly. Where the genus tends toward muted greys and browns, this one carries a rich amber-to-orange right across the body that seems to glow against dark substrate, even in a dim enclosure. It is a genuine standout, the kind of premium Cubaris a collector builds a display around. Every colony we send is captive-bred here in the UK.

Introduction

This is Cubaris sp. 'Amber Firefly', a rare warm-toned species from the forests of Southeast Asia, also sold as the Firefly Cubaris. One honest note on the name: it does not glow in the dark. There is no bioluminescence here; "Firefly" simply describes the warm amber cast of the shell, which is vivid enough to earn the comparison. It sits among the premium end of the genus, and its colour genuinely sets it apart there.

Appearance

A medium Cubaris at around 10 to 18 mm, rounded in the classic cave-isopod shape, in amber through to warm orange. The exact tone varies from animal to animal and with conditions, so a colony has real depth rather than a single flat colour, and the amber deepens over successive moults as juveniles mature. Like the rest of the genus it conglobates into a tight ball when disturbed, and the warm colour stays on show even curled.

Care

Amber Firefly is a warm-tropical Cubaris of medium difficulty, so it wants warmth, 22 to 28°C, and consistent humidity around 60 to 75% on a gradient rather than a soaked tub. Keep about a third damp with sphagnum and leaf litter and let the rest run a little drier, with enough ventilation to keep the air from going stale; overwetting is the one real risk, so mist to top up rather than saturate. Build a deep substrate on organic topsoil, flake soil and white-rotted hardwood rather than coco coir, with crushed limestone worked through for the constant calcium clean moults need, and give plenty of cork and leaf cover, as this is a shy, hiding species. Our complete Cubaris care guide covers the detail.

Diet

Leaf litter and decaying white wood are the base, kept topped up. Add small amounts of vegetable, the occasional bit of fruit, and regular protein such as fish flake or dried shrimp, plus a permanent calcium source. Its appetite is moderate, so go easy on fresh food and lift anything uneaten within a day or two before it moulds in the warmth. A springtail culture is worth running alongside to keep a premium colony clear of mould.

Breeding

Amber Firefly breeds at the measured pace typical of premium Cubaris: a patient establishment, then steady growth once settled. Give a new group a couple of months to find its feet, keep conditions stable, and resist digging after them while they establish. Young are released fully formed and colour up as they moult. A larger starter group settles faster and gives better genetic spread.

Who is this for?

The Amber Firefly suits the keeper with a little Cubaris experience who wants a genuinely rare, warm-coloured display species, and the collector rounding out a premium shelf alongside the Amber Ducky, Cappuccino and the iconic Rubber Ducky. It is not a first isopod, and not for anyone who over-waters or needs constant visible activity; a hardier accessible Cubaris like the Panda King is the better place to start.

All stock is captive-bred here in the UK and travels under our live arrival guarantee, in a ventilated deli tub with damp sphagnum inside a double-walled box. We post Monday to Thursday by Royal Mail next day before 1pm, with a 20% overcount in every order.