Euathlus sp. Valparaiso
Valparaiso Rose - complete care guide
Valparaiso Rose
Temperature
20-24 °C
Target ambient range
Humidity
50-60 %
Substrate / enclosure RH
Adult DLS
13-16 cm
Average - varies per individual
Moult interval
Sling 4-8w - Juv 2-3.3mo
Adult 10-14mo
Adult cycle = mature females; males never moult again after maturity
About
An undescribed Chilean Euathlus from the Valparaíso Region that entered the hobby via a 2008 import and was previously sold as "Aphonopelma aberrans" - a name now considered a nomen dubium (Gabriel, 2013). Physically very similar to E. truculentus but noticeably larger: a brown body, golden carapace, red-brown abdominal hairs and two reddish knee stripes on a 13-15 cm frame - one of the biggest of the Chilean Euathlus group. Field observations note it shelters under large rocks and in crevices rather than excavating burrows. Same famous calm temperament; slow-growing with decades-lived females.
Husbandry cheat sheet
- Origin
- Chile (Valparaíso Region, V Región)
- Habitat
- Mediterranean coastal scrub and rocky slopes
- Temperament
- Docile
- In your collection
- 0
Growth, lifespan & conservation
- Growth rate
- Slow
- Maturity
- ♀ 66mo ♂ 48mo
- Lifespan
- ♀ 20yr ♂ 5yr
- Continent
- South America
- UK availability
- Uncommon
Care Guide
Euathlus sp. Valparaiso
Valparaiso Rose - a complete husbandry sheet. Use as a starting point and adjust to your individual specimen.
What size enclosure does a Valparaiso Rose Tarantula need?
Adults
30 × 25 cm (12 × 10 in) for a mature adult - bigger than the dwarf forms need. Floor space matters more than height.
Slings & Juveniles
House spiderlings in small, appropriately sized deli cups or sling enclosures, upgrading as they grow toward the larger adult size.
To map exact floor space and substrate safety limits for your setup, use our free interactive tarantula enclosure planner.
What temperature and humidity does a Valparaiso Rose Tarantula need?
Heating
The Valparaiso Roses is comfortable at 20-24 °C and tolerate cool UK room temperatures without supplementary heat; warm the room only if it stays under 15 °C for long spells.
Humidity
50-60 %: the dry-side extreme of the genus - mostly dry substrate and a full water dish suits coastal-scrub stock perfectly.
Ventilation
Cross-ventilation is essential - side-vented enclosures, never stagnant.
What substrate is best for a Valparaiso Rose Tarantula?
Recommended Mixes
Depth
5-8 cm
Notes
Keep substrate dry to barely moist - never soaking. Pack it firm; this species adopts existing crevices rather than digging.
How do you set up a Valparaiso Rose Tarantula enclosure?
Décor
The Hide
Heavy flat cork or stone slabs set directly on the substrate - they shelter in natural crevices rather than digging, so anchor décor firmly.
Water
Always provide a shallow fresh water dish - a 14 cm spider drinks properly. Keep it full and clean it regularly.
Lighting
No special lighting needed. Ambient room light is enough.
How often should you feed a Valparaiso Rose Tarantula?
Good Feeders
Long refusal worrying you? Separate premoult fasting from genuine problems with our "Is my T okay?" checker.
Is my Valparaiso Rose Tarantula dying or moulting?
Pre-moult signs to look for
Refusing food for weeks is normal before a moult - a healthy Valparaiso Rose Tarantula fasting is almost never an emergency in itself. Watch for slowing down and spending more time in the hide, laying a thick moult mat of web on the floor. New World species like this one often show a bald spot on the abdomen that darkens to near-black as the new skin underneath readies - a darkening bald patch is a reliable countdown, not a disease.
On its back is MOULTING, not dying
A Valparaiso Rose Tarantula lying upside down or on its side with legs curled inwards is almost certainly mid-moult. Do not touch it, do not right it, do not mist it - just remove any live prey (crickets can kill a defenceless moulter) and leave the room.
How long between moults?
For this species, expect a moult roughly every 28-56 days for spiderlings, every 60-100 days for juveniles, and every 140-220 days for sub-adults, with adult females moulting around every 10 months (up to 14.3 months at the extreme). Males never moult again after their ultimate (mature) moult.
After the moult: fang hardening time
The new exoskeleton stays soft, with fangs that cannot grip, for roughly 7 days in this species. Offer no food and no handling for about 7 days - feeding too early is how fresh moulters get injured. The shed exuvium is also the best sexing tool there is - see our tarantula sexing guide for what to look for.
Genuinely worried about behaviour that is not moulting? Our "Is my T okay?" triage tool walks the danger signs one by one.
What ongoing care does a Valparaiso Rose Tarantula need?
🪞 Moulting
Signs: refuses food, abdomen darkens and goes glossy, becomes sluggish, often seals the hide entrance. During the moult: do not disturb, remove any live prey, keep water available. Wait until the fangs are black and hard (about a week for adults, 1-2 days for slings) before feeding again. Adult intervals apply to mature FEMALES - a mature male never moults again.
🧹 Cleaning
Daily: check the water dish. Weekly: remove uneaten prey boluses and spot-clean. Full deep clean only every few months.
✋ Handling
A big, gentle, slow-moving Euathlus - among the calmest spiders in the hobby. Handle rarely and low to the ground; the size means falls matter.
What are the most common mistakes when keeping Valparaiso Rose Tarantulas?
✓ What They Love
- Fresh water dish at all times
- Cross-ventilation
- Cool, stable room temperature
- Heavy, stable rock-style hides pressed to the substrate
- More floor space than the dwarf manicata forms - this one reaches 14 cm
✕ Common Mistakes
- Soaking-wet substrate
- Supplementary heat above ~27 °C
- Daily misting
- Unstable stacked rocks - anchor everything
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