The Ember Bee (Ardentiella sp. "Ember Bee," formerly Merulanella) is one of the boldest isopods you can keep. Jet black plates fade into red, orange, and yellow, and unlike most collector isopods, Ember Bees climb, explore, and stay out where you can see them. They are not a beginner species, but getting two things right, ventilation and climbing structure, makes all the difference.
Ember Bee Isopod Quick Facts
- Scientific name: Ardentiella sp. "Ember Bee" (formerly Merulanella sp.)
- Origin: Vietnam
- Adult size: Up to about 2.2 cm
- Care level: Intermediate to advanced
- Temperature: 66 to 79°F, favor the cooler end
- Humidity: Moderate, with a strong dry zone
- Ventilation: High
- Breeding rate: Moderate for a premium Ardentiella, slower than common species
- Maturity: Roughly 5 to 7 months
- Activity: Active, bold, climbing, often visible in the open
A Note on the Name
You will see these listed under two genus names. They were sold for years as Merulanella. In 2025, researchers Kästle and Regalado Fernández reassessed that group and described the new genus Ardentiella, named from the Latin for "burning" or "fiery" after the bold colors of its members. The Southeast Asian species in the hobby, including Ember Bee and Scarlet, are now sold as Ardentiella.
The Two Things That Matter Most
- High ventilation. Ardentiella need much more airflow than most tropical isopods. Vent two opposite sides so air actually crosses the enclosure. Stagnant, humid air is the most common reason colonies crash.
- Climbing structure. They climb rather than burrow. Build the enclosure around vertical cork bark, branches, and lichen covered sticks instead of deep substrate.
Enclosure Setup
Use a taller enclosure with cross ventilation and a tight fitting lid. Adults and especially young can climb smooth plastic and glass, so treat any gap as an exit.
A moderate layer of our ABG style mix (recipe here) holds moisture and supports microfauna. You do not need the deep substrate that burrowing Cubaris want. On top, add:
- A thick layer of hardwood leaf litter, topped up as it gets eaten
- Decaying hardwood
- Cuttlebone for calcium, available at all times
- A culture of Tropical Pink springtails to keep mold and leftovers in check
- Upright cork bark and branches
- Lichen covered sticks for climbing and grazing
Humidity and the Moisture Gradient
Keep them on the drier side compared to Cubaris, with a clear dry zone. Mist one side and keep damp sphagnum there, and let the other side stay distinctly drier. The substrate should be damp, never waterlogged. Moisture plus airflow, never moisture alone.
Temperature
Keep them on the cooler side, roughly 66 to 79°F, and favor the lower end. Heat is a bigger risk than cold for this genus. Do not use a heat mat, keep them out of direct sun, and plan a cooler spot for them if your home runs warm in summer.
Feeding
Leaf litter and decaying hardwood should always be available, and they also graze on lichen. Offer small amounts of fish flakes, freeze dried shrimp, or soft vegetables and remove leftovers within a day, since food molds quickly in a humid bin. Keep cuttlebone available at all times.
Breeding
Ember Bees breed slower than common species, with small broods, and only once a group is settled. In our experience Ardentiella take roughly five to seven months to mature. If a colony stops producing, check airflow, temperature, and moisture before anything else. A group of 10 to 20 is a strong foundation.
Common Mistakes
- Not enough ventilation. The number one killer for this genus.
- Keeping them too wet. They want a real dry zone.
- Setting them up like a burrowing species. Give them vertical surfaces.
- Letting them get too warm. No heat mats, no hot rooms.
- A loose lid. Young climb smooth walls and find gaps.
Common Questions About Ember Bee Isopods
Are Ember Bees Merulanella or Ardentiella?
Both names refer to the same animals. Ember Bees were sold as Merulanella and are now placed in Ardentiella after a 2025 reassessment.
Do Ember Bee isopods need high humidity?
They need moderate humidity with a strong dry zone and high ventilation. Wet, stagnant enclosures are the most common cause of losses.
Why are my Ember Bees climbing the walls?
Climbing is normal. They are semi arboreal and use vertical space. Give them upright bark and branches, and make sure the lid seals.
Are Ember Bees good for beginners?
They are intermediate to advanced. Keepers with a Cubaris colony or two under their belt are usually ready for them.
How long do Ember Bees take to mature?
Roughly five to seven months in our experience.
Where to Buy Ember Bee Isopods
All Ember Bee Isopods at Creature Cache are captive bred and ship FedEx Priority Overnight with a 100% live arrival guarantee. Shop Ember Bee Isopods, or join the Creature Club for restock alerts and 10% off your first order.
More reading: How to Set Up Your First Isopod Enclosure, our ABG substrate recipe, and our springtail care guide.
Questions about your animals? Email us anytime at info@creaturecache.com.