Quick Answer: Chromatopelma cyaneopubescens, the Green Bottle Blue (GBB), needs a dry arboreal enclosure (40-60% RH — lower than most tarantulas), 75-85°F, and a permanent water dish. Bone-dry substrate is critical. Heavy webber, beginner to intermediate, one of the most visually striking tarantulas in the hobby. Download the free care sheet PDF.
Introduction
Chromatopelma cyaneopubescens, the Green Bottle Blue, is one of the most visually spectacular tarantulas in the hobby and one of the few species where the coloration description actually undersells the real thing. A mature specimen shows a vivid green carapace, deep blue legs, and a bright orange-red abdomen simultaneously. Both sexes display full adult coloration, which is unusual in tarantulas. The species is endemic to the arid Paraguaná Peninsula of Venezuela, where it inhabits semi-arid scrubland and builds elaborate web retreats in low desert vegetation.
The GBB has developed a reputation as the ideal next step for keepers who have started with a true beginner species. It is reliable, fast-growing, consistently feeding, and the webbing behavior alone makes it one of the most engaging tarantulas to watch in a collection. A well-settled GBB in a proper enclosure will build a webscape that fills the entire space within a few months.
The one care requirement that catches keepers off guard: this is a dry species. The GBB needs conditions that are the opposite of what most tarantulas require. Understanding that is the entire key to keeping one successfully.
Quick Stats
| Parameter | Detail |
|---|---|
| Scientific name | Chromatopelma cyaneopubescens |
| Common name | Green Bottle Blue (GBB) |
| Origin | Paraguaná Peninsula, Venezuela |
| Habitat | Semi-arid scrubland; elaborate web retreats in low desert vegetation |
| Adult female legspan | 5-6 inches |
| Adult male legspan | 4-5 inches; full adult coloration in both sexes |
| Female lifespan | 10-14 years |
| Male lifespan | 3-4 years post-maturity |
| Experience level | Beginner to Intermediate |
| Urticating hairs | Yes (New World) — kicks readily when stressed |
| Venom | New World — not medically significant |
| Webbing | Heavy, elaborate webscapes; one of the best webbers in the hobby |
Enclosure Setup
Set up an arboreal enclosure with strong cross-ventilation. The GBB needs airflow to stay dry — a stagnant enclosure holds humidity even without misting, and that humidity will cause problems over time. Top-opening or front-opening enclosures both work as long as vents are positioned for cross-flow.
| Life Stage | Enclosure Size | Notes |
|---|---|---|
| Sling (under 1") | 6-16 oz deli cup | Top vent; dry substrate, moist base corner only |
| Juvenile (1-3") | 6"W x 6"D x 8"H | Cross-ventilation; cork bark anchor for webbing |
| Sub-adult / Adult | 8"W x 8"D x 12"H | Arboreal with cross-vents; anchor point at mid-height |
Substrate: 2-3 inches of bone-dry coco fibre or a coco/sand mix. Anchor a piece of cork bark vertically or diagonally inside the enclosure — the GBB will use this as its primary web anchor and build outward from it. A fully settled adult GBB will web so heavily that the cork bark eventually disappears inside the structure. A permanent water dish at substrate level is required and serves as the sole moisture source in the enclosure. Do not mist.
Temperature and Humidity
The most important thing to understand about GBB care is that this species comes from a desert peninsula, not a rainforest. The humidity requirements are the inverse of almost every other tarantula commonly kept in the hobby. High humidity does not make a GBB more comfortable. It makes it sick.
| Parameter | Target Range | Avoid |
|---|---|---|
| Daytime temperature | 75-85°F (24-29°C) | Below 65°F or above 90°F |
| Night temperature | 68-76°F (20-24°C) | Sustained below 62°F |
| Ambient humidity | 40-60% RH | Above 70% sustained |
| Substrate | Bone-dry throughout | Any sustained moisture in substrate |
Keep the substrate dry. Refresh the water dish every 3-4 days. The evaporation from the dish provides adequate localized humidity. Do not mist the enclosure. Do not add a humid hide. Cross-ventilation ensures the ambient stays in the correct range for most indoor environments in North America.
Feeding
GBBs are strong, enthusiastic feeders. They will typically emerge from the web retreat to hunt actively when prey is detected in the enclosure. Prey dropped near the web anchor is usually taken within minutes. GBBs grow quickly relative to many tarantulas of similar adult size.
| Life Stage | Prey Item | Frequency |
|---|---|---|
| Sling | Fruit flies, pinhead crickets (pre-killed) | Every 4-5 days |
| Juvenile | Small crickets, small dubia roaches | Every 5-7 days |
| Sub-adult / Adult | Medium-large crickets, dubia roaches | Every 7-10 days |
| Pre/Post-molt | None — remove all live prey | Resume 10-14 days post-molt |
Remove uneaten prey within 24 hours. Pre-molt fasting is typically short for this species — 2 to 6 weeks. A GBB that suddenly stops eating after reliable feeding is almost certainly in pre-molt, not ill. Do not force-feed.
Watering
A permanent shallow water dish at substrate level is the sole moisture source for this species. Change the water every 3-4 days. GBBs drink from the dish reliably. Do not mist the enclosure or the spider directly. Do not overflow the dish onto the substrate. The dish evaporation alone provides adequate localized moisture for this arid species.
For slings under 1 inch, a water dish is not needed. Keep a very small moist corner in one side of the substrate and allow the rest to stay dry. Graduate to a full water dish once the spider reaches 1 inch or larger.
Molting
Pre-molt signs in GBBs: prey refusal for 2 to 6 weeks, abdomen darkening (the orange becomes noticeably duller), and heavy webbing or sealing of the retreat entrance. GBBs frequently web themselves completely inside the retreat before molting. Do not disturb a sealed retreat. Remove all live prey immediately when pre-molt signs appear.
Post-molt: wait 10-14 days before offering food. Fangs must be fully dark before the spider is ready to eat. Colors deepen with each molt and reach full adult intensity at maturity. A freshly molted GBB at sub-adult or adult size is one of the most visually striking moments in the keeping hobby.
Temperament and Handling
Fast and skittish, not aggressive. The GBB's primary defense is flight and urticating hair kicks, not biting. It will move quickly when startled but does not actively pursue or threat-posture the way some other species do. Despite this, it is not a handling species. The urticating hairs are kicked readily under stress and cause significant skin and eye irritation. Use tongs for prey delivery and enclosure maintenance.
The GBB is widely described as one of the best display tarantulas in the hobby. It is frequently active during daylight hours, it builds visible elaborate web structures, and the coloration makes it immediately striking to anyone who sees the enclosure. If you want a tarantula you can watch, the GBB delivers that consistently.
Is This Species Right for You?
The Green Bottle Blue is the right choice for a keeper who has successfully kept a true beginner species for at least six months and wants something with more visual impact and behavioral interest. The care requirements are not difficult, but the dry husbandry is the opposite of what most beginner care guides teach, and keepers who apply standard humid-enclosure thinking to a GBB will run into problems.
If you want a tarantula that looks like nothing else, webs heavily enough to completely redecorate its enclosure, grows quickly, feeds reliably, and will be a centerpiece of any collection for 10 to 14 years, the GBB is the answer. There is no other species that checks all of those boxes simultaneously.