Brazilian Black Tarantula Care Guide (Grammostola pulchra)
The Brazilian Black Tarantula (Grammostola pulchra) is widely regarded as one of the most beautiful tarantulas in the hobby. Its uniform, velvety jet-black coloration is unmatched among commonly kept species, and its calm, slow-moving temperament makes it as beginner-friendly as it is visually striking. This guide covers everything you need to keep a Brazilian Black successfully.
Species Overview
- Scientific name: Grammostola pulchra
- Common name: Brazilian Black Tarantula
- Adult leg span: 6–7 inches
- Lifespan: Females 20–30+ years; males 6–8 years
- Origin: Southern Brazil and Uruguay
- Type: Terrestrial, New World
- Difficulty: Beginner
Grammostola pulchra is slow-growing and slow to mature, which combined with limited captive breeding has historically made it one of the more expensive beginner tarantulas. Demand consistently outpaces supply. Always purchase captive-bred animals from a reputable breeder when possible.
Enclosure
Brazilian Blacks are terrestrial and need floor space more than height. A standard adult enclosure is 12" × 12" × 10" or similar — wider than it is tall. Avoid excessively tall enclosures, as falls can be fatal to a heavy-bodied tarantula.
- Substrate depth: At least 4–6 inches for adults to allow burrowing. A mix of coconut fiber, peat moss, and topsoil works well.
- Hide: Provide one cork bark hide or similar retreat. Individuals vary in whether they use it, but it should always be available.
- Ventilation: Cross-ventilation is important. Avoid fully sealed enclosures.
- Water dish: A shallow water dish should always be available for adults.
See our Best Tarantula Enclosures, Best Tarantula Substrate, and Best Tarantula Hides guides.
Temperature
Brazilian Blacks do well at normal room temperature — 68–80°F is ideal. They do not require supplemental heating in most homes. Avoid sustained temperatures above 85°F. As a species from subtropical grasslands in southern Brazil and Uruguay, they are tolerant of mild temperature fluctuation within the recommended range.
Humidity
Like most Grammostola species, the Brazilian Black does well in a mostly dry enclosure with access to a slight moisture gradient rather than a specific humidity percentage. Keep the enclosure dry overall, but overflow one corner of the water dish every couple of weeks to lightly moisten one area of the substrate. Always keep a fresh water dish available. Avoid consistently damp substrate, which promotes mold and bacterial growth. Good ventilation is generally more important than maintaining a specific humidity reading.
Feeding
Brazilian Blacks are slow-growing and do not need to be fed as frequently as faster-growing species. Feed juveniles every 5–7 days and adults every 7–14 days. Offer prey no larger than the tarantula’s abdomen. Like other Grammostola, they may fast for extended periods — particularly before molts — and this is completely normal. Healthy adults have been known to refuse food for many months, and prolonged fasts are well documented in this genus.
- Spiderlings: Fruit flies, pinhead crickets
- Juveniles: Small crickets, small mealworms, small dubia roaches
- Adults: Crickets, dubia roaches, mealworms
Remove uneaten prey within 24 hours. Never feed during or immediately after a molt. See our Best Tarantula Feeding Tongs guide.
Water
Always provide a shallow water dish for adults and sub-adults. Use a dish shallow enough to allow easy access for drinking — bottle caps work for spiderlings, and a small reptile water dish is appropriate for adults. Refresh the water weekly or when soiled. See our Best Tarantula Water Dishes guide.
Handling
Grammostola pulchra is one of the calmer tarantulas commonly kept in captivity. Most individuals are slow-moving and rarely defensive, making them well-suited to new keepers who want an interactive species. Always read body language before and during any interaction. Handle close to the ground and never over hard surfaces. As a New World species, it possesses urticating hairs on the abdomen that it may flick when stressed, causing skin and eye irritation.
Urticating Hairs
As a New World species, G. pulchra relies primarily on urticating hairs as a defense mechanism rather than biting. A bald patch on the abdomen indicates the spider has been flicking hairs — a sign of stress. Reduce disturbance and handling frequency if this occurs. The hairs will grow back at the next molt.
Molting
Brazilian Blacks molt infrequently — adults may only molt once every 1–2 years, and juveniles grow slowly compared to most other commonly kept species. Before a molt, the spider will refuse food, become less active, and may flip onto its back. Do not disturb the spider during this period. Remove all live prey immediately when pre-molt signs appear. Leave the water dish in place so the spider has access to hydration throughout the process. After molting, wait at least 2 weeks before offering food to allow the new exoskeleton to fully harden. See our Tarantula Molting Guide for full details.
Lifespan
Female G. pulchra are among the longest-lived tarantulas in the hobby, routinely reaching 20–30+ years in captivity with good care. Males live significantly shorter lives — typically 6–8 years — and will decline within 1–2 years of reaching sexual maturity. Because females live dramatically longer, captive-bred females typically command higher prices than males or unsexed juveniles. Sexing via a shed molt is the most reliable method when purchasing unsexed animals.
Health & Common Issues
- Extended fasting: Normal for this genus. Healthy adults may refuse food for many months. Offer prey every 2 weeks and remove if refused within 24 hours.
- Dehydration: A noticeably shrunken abdomen usually indicates dehydration and should prompt you to check that fresh water is available and the enclosure provides an appropriate moisture gradient.
- Injuries from prey: Always remove uneaten prey within 24 hours. Crickets will bite a molting or post-molt tarantula.
- Abdomen rupture: Caused by falls. Always handle close to the ground.
See our Tarantula Diseases & Health guide for more detail.
Is the Brazilian Black Right for You?
The Brazilian Black is the best choice if you want the most visually striking beginner tarantula available. No other commonly kept species matches its deep, uniform black coloration, and its calm temperament means it is as easy to keep as it is impressive to display. The tradeoffs are price and patience — captive-bred animals are expensive and slow to grow, and like all Grammostola, they may fast for extended periods. If budget is a concern, the Chilean Rose offers a similar temperament at a fraction of the cost. If you want a large, calm species with more color, the Chaco Golden Knee is worth considering.
New to tarantulas? Start with our Tarantula Care Guide and Are Tarantulas Good for Beginners? overview.
Quick Reference
| Parameter | Recommended Range |
|---|---|
| Temperature | 68–80°F |
| Humidity | Low ambient; moisture gradient in one substrate corner |
| Enclosure (adult) | 12" × 12" × 10" minimum |
| Substrate depth | 4–6 inches minimum |
| Feeding frequency | Every 7–14 days (adults, when eating) |
| Lifespan (female) | 20–30+ years |
| Lifespan (male) | 6–8 years |