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Cuban blue scorpion (Rhopalurus junceus)

Cuban blue scorpion (Rhopalurus junceus), typical appearance of the species

Invertebrates · Difficulty: Intermediate

Key facts and care guidance for Cuban blue scorpion (Rhopalurus junceus) (origin: Cuba (endemic)). Adult size around approx. 6–9 cm. Life expectancy approx. 5–7 years. The values below are carefully researched guidance.

Short answers

Cuban blue scorpion: How big does the enclosure need to be?

25×25×30 cm with vertical cork bark (a bark and tree dweller).

Cuban blue scorpion: What temperature does it need?

Daytime 26–32 °C, at night 22–24 °C.

Cuban blue scorpion: Does it need UVB lighting?

UVB: No UVB needed (nocturnal).

Cuban blue scorpion: How long do they live?

Life expectancy: approx. 5–7 years.

Cuban blue scorpion: Is it suitable for beginners?

Rather not – it is considered an intermediate species (difficulty: Intermediate).

Climate

Daytime temperature
26–32 °C
Night temperature
22–24 °C
Basking spot
—
Humidity
50–60 % (substrate slightly damp, not wet)
UVB
No UVB needed (nocturnal)

Enclosure

Minimum size
25×25×30 cm with vertical cork bark (a bark and tree dweller)
Substrate
A coco and peat mix, slightly damp, vertical cork bark

Feeding

Food
House crickets, crickets, roaches
Feeding interval
adults 1×/week, fed in the evening or at night

Key facts

Adult size
approx. 6–9 cm
Life expectancy
approx. 5–7 years
Origin
Cuba (endemic)
Protection status
Not listed under CITES
Brumation
None
Cohabitation
Keep them singly – territorial and aggressive towards its own kind (cannibalism). The reason is not fighting but feeding: these animals take anything that fits in the mouth, and a second animal in the enclosure counts.

Notes

Taxonomically placed today as Heteroctenus junceus (ex Rhopalurus junceus). Hardy and robust, but a buthid with painful venom – no hand contact. The venom is used in Cuban cancer research (Vidatox/Escozul).

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Related species

All species in the care wiki →

What you need to start

To keep Cuban blue scorpion (Rhopalurus junceus) you typically need: a suitable enclosure (25×25×30 cm with vertical cork bark (a bark and tree dweller)), substrate (A coco and peat mix, slightly damp, vertical cork bark), a heat source with a thermostat, UVB lighting, thermometer and hygrometer, a water dish and hides. You will find equipment in the Reptoria marketplace.

The complete, interactive care database is in the Reptoria app.

Last updated: 9 October 2026 · Editor: Reptoria editorial team · Sources include: https://en.wikipedia.org/wiki/Rhopalurus_junceus, https://www.ntnu.no/ub/scorpion-files/r_junceus.php

All values are non-binding guidance and do not replace expert advice. Research thoroughly from several sources before acquiring and keeping an animal, and observe the applicable law (species and animal protection in particular).