Centruroides gracilis
Florida Bark Scorpion: Advanced Care Guide
Keeper Snapshot: A large, fast bark scorpion with more humidity tolerance than desert bark species: adults reach about 2.5-4 inches, among the larger Centruroides, and can be kept in carefully managed groups.
Group: ScorpionsDifficulty: Spice 3: IntermediateSetup: Semi-arboreal bark/crevice scorpionHandling: Do not handle
Use This Guide Safely
- Confirm the exact animal. Match this guide to the species, locality, size, and life stage on your label. If the ID is uncertain, use the more conservative part of the range and ask before changing the setup.
- Change one thing at a time. Treat temperature and humidity as target zones, then watch posture, burrowing, drinking, feeding, and molt behavior before making another adjustment.
- Respect the handling boundary. If the guide says no handling, fast, defensive, or medically significant, plan transfers with catch cups, locked lids, and no bare hands. For serious bites, stings, or symptoms, seek emergency medical care.
Quick Snapshot
| Temperature | 75-85°F |
|---|---|
| Humidity | Ambient moderate (55-70%) with strong airflow; dry surface, one humid retreat |
| Setup Type | Semi-arboreal bark/crevice scorpion |
| Substrate | Soil/coco mix kept lightly dry with a humid retreat |
| Feeding | Roaches or crickets weekly |
| Care Difficulty | Spice 3: Intermediate |
| Handling | Do not handle |
Humidity zones: Very Low under 30% - Low 30-60% - Low-Moderate 40-70% - Moderate 60-80% - Moderate-High 70-85% - High 80%+ - Very High 90%+
Enclosure Format / Size Class
- Baby Buddy: secure starter enclosure for 2i-3i instars (escape-proof ventilation only)
- vertical bark setup for adults/juveniles
Warnings First
- Fast climber
- Defensive when disturbed
- Communal-capable only with space, equal sizes, and heavy feeding
- Secure lid and tiny ventilation are mandatory
- Moderate humidity only works with airflow behind it. A stuffy, damp bark setup produces mycosis on the cuticle; the same moisture with cross ventilation is fine.
Simple Care
- Give vertical cork, not just a hide on the ground.
- Let the enclosure breathe; do not keep it wet.
- Cross ventilation: low vents on one side, higher vents on the other, so air moves up past the bark.
- Provide a moisture zone but avoid soaking the full enclosure.
- Shallow water dish with pebbles in it so small instars cannot drown.
- Groups can work, but only with extra cork, equal sizes, and a plan to separate.
Advanced Keeper Notes
Enclosure & Microclimate
- Centruroides gracilis is more tolerant of moderate humidity than C. sculpturatus, but it still needs airflow and dry surface options.
- Tall cork slabs, bark tubes, and tight vertical retreats reduce stress and improve display behavior.
- Florida bark scorpions often tolerate group housing better than many scorpions. Treat it as conditional: multiple vertical retreats, dry perches, equal-sized animals, and frequent feeding are what make it work.
- It only tolerates moderate humidity because the air is moving. Set vents low on one wall and higher on the opposite wall so air rises diagonally past the cork. That is what lets you run 55 to 70% ambient without the bark faces staying wet. The same humidity in a still enclosure gives you fungal cuticle problems on an animal that spends its life pressed against a vertical surface.
- Ventilation and humidity are one setting, not two. Airflow dries the box, so you hold moderate ambient by keeping a damp retreat and a water dish feeding moisture in, not by restricting vents. Closing vents to hold a humidity reading is the classic way to lose a bark scorpion that looked perfectly settled.
- Judge moisture by touching the substrate and the bark, not by a wall gauge. The surface substrate and the exposed bark faces should be dry to the touch, while the retreat corner and the lower substrate stay lightly damp. If the bark never dries between mistings, add airflow.
- Keep a shallow water dish with pebbles or coarse grit in it so the waterline sits below the rim. Small instars genuinely drown in open dishes, and the stones give them a way back out. The dish also feeds humidity at floor level, which means the rest of the enclosure can stay properly dry.
- Mist under the cork and into the retreat corner rather than over the whole enclosure. That builds one reliable humid microclimate where the animals choose to sit, while the open bark and the air keep drying. A quick spritz on one bark face also brings them out to drink.
Feeding, Growth & Maintenance
- Feeding: crickets or small roaches up to body length, smaller for instars. Young eat every 4-7 days, adults every 1-2 weeks; a well-fed animal skipping meals for a while is normal: go by abdomen condition. In a group, scatter-feed so every scorpion has a shot before anyone starts wandering.
- Growth: about 5-6 molts to maturity; lifespan ~3-6 years. Premolt scorpions stop eating and hide. Remove every feeder so nothing nibbles the soft new cuticle, and leave a freshly-molted animal completely alone until it hardens and darkens. Separate a molting animal from a group if you cannot protect it.
- Maintenance: spot-clean boluses, dead feeders, and any mold promptly. A small clean water dish or a periodically dampened corner covers hydration: this species takes more moisture than the desert bark scorpion but still wants airflow and a dry surface to retreat to. Avoid unnecessary rehousing, and keep transfers tool-based: it's a fast climber.
Possible Origin / Range
- Likely native range: Caribbean and Central American lineage with established Florida populations; often associated with warm humid coastal habitats.
- Habitat translation: More humidity-tolerant than desert bark scorpions, but still needs dry perches and strong airflow.
Advanced Keeper Details
- Offer vertical cork plus a humid retreat instead of keeping the whole enclosure damp.
- Group housing is optional and risk-bearing. Keep animals similar in size, provide several bark lanes and hides, feed heavily, and separate any thin, bullied, or molting scorpion.
- Juveniles need micro-ventilation and smaller quarters; adults still need strict escape protocol.
- Adult size ~2.5-4 in (one of the larger Centruroides); lifespan ~3-6 years. Venom is much milder than the desert bark scorpion's (local pain rather than a medical emergency), but it is still a fast buthid and not a handling animal.