What is a Cobalt Blue Tarantula (Cyaneopubescens)?
The Cobalt Blue Tarantula, scientifically known as Cyaneopubescens, is a stunning and captivating species of tarantula native to the tropical forests of Myanmar and Thailand. Known for its vibrant metallic blue coloration, this tarantula is a favorite among hobbyists and arachnid enthusiasts. Its striking appearance, coupled with a moderately docile temperament, makes it a popular choice for those looking to keep a unique and visually appealing pet. This article provides a comprehensive guide to caring for a Cobalt Blue Tarantula, covering everything from enclosure setup and feeding to handling and breeding.
Appearance and Characteristics
The Cobalt Blue Tarantula is most recognized for its brilliant iridescent blue coloration, which is most prominent on its legs and carapace. The body itself is typically a dark, almost black color, providing a stark contrast to the striking blue. Juveniles may have a less intense coloration, with the blue becoming more vibrant as they mature. These tarantulas have a relatively slender build compared to some other species, and their overall appearance is sleek and elegant. They are medium to large sized tarantulas, with females generally being larger than males. The blue coloration is not just for show; it serves as a form of camouflage in their natural habitat, helping them blend in with the shadows and foliage.
Size and Lifespan

Cobalt Blue Tarantulas are medium-sized tarantulas. Females can reach a leg span of up to 5-6 inches, while males are typically slightly smaller. The lifespan of a Cobalt Blue Tarantula varies depending on the sex. Females can live for an impressive 12 to 15 years or even longer with proper care, while males typically live for only 3 to 5 years. Knowing the lifespan helps owners understand the long-term commitment involved in caring for these fascinating creatures. The size and longevity make them a rewarding pet for those willing to provide the necessary care and attention.
Habitat and Natural Environment
In their natural habitat, Cobalt Blue Tarantulas are found in the tropical forests of Myanmar and Thailand. They are terrestrial spiders, meaning they primarily live on the ground. They construct burrows in the soil, often under rocks, logs, or leaf litter, where they spend most of their time. The environment is characterized by high humidity, warm temperatures, and ample rainfall. Understanding their natural environment is crucial for replicating it in captivity to ensure the tarantula’s well-being. Providing a similar environment helps to reduce stress and promotes natural behaviors.
Ideal Enclosure Setup
Creating the right enclosure is vital for the health and happiness of your Cobalt Blue Tarantula. A glass or acrylic terrarium with a secure lid is recommended. The size of the enclosure should be appropriate for the tarantula’s size; a 10-gallon tank is suitable for juveniles, while adults require a 20-gallon or larger tank. Proper ventilation is essential to prevent mold and maintain air quality. The enclosure should also include a hide, such as a piece of cork bark or a commercially available spider hide, to provide a secure retreat for the tarantula. Ensure the enclosure is escape-proof, as these tarantulas are skilled climbers.
Substrate and Decorations

The substrate is the bedding material that covers the bottom of the enclosure. For Cobalt Blue Tarantulas, a substrate that retains moisture and allows for burrowing is ideal. A mixture of coconut fiber, peat moss, and a small amount of vermiculite is often used. The substrate should be deep enough for the tarantula to burrow, typically 4-6 inches. Decorations should mimic the natural habitat, incorporating elements like cork bark, artificial plants, and sturdy branches. Avoid sharp or abrasive objects that could injure the tarantula. These decorations also provide enrichment, encouraging natural behaviors like exploration and hiding.
Temperature and Humidity
Maintaining the correct temperature and humidity levels is crucial for the health of your Cobalt Blue Tarantula. The ideal temperature range is between 75-85°F (24-29°C). A heat mat placed on the side of the enclosure can help maintain this temperature. Avoid placing the heat mat directly under the enclosure to prevent overheating. Humidity should be kept between 70-80%. This can be achieved by misting the enclosure with dechlorinated water 2-3 times per week, depending on the ventilation and substrate. A hygrometer is a valuable tool for monitoring humidity levels. Proper temperature and humidity support molting, feeding, and overall well-being.
Feeding Your Cobalt Blue Tarantula
Cobalt Blue Tarantulas are carnivores and primarily feed on insects. The diet should consist mainly of crickets, roaches, mealworms, and other feeder insects. The size of the prey should be appropriate for the tarantula’s size; juveniles should be fed smaller insects, while adults can handle larger prey. Overfeeding is not a major concern, but it’s important to remove any uneaten food within 24 hours to prevent mold growth. Regularly observe your tarantula’s feeding habits and adjust the feeding frequency accordingly. A well-fed tarantula is a healthy tarantula.
Diet and Feeding Schedule

The feeding schedule should be adjusted based on the tarantula’s age and size. Spiderlings and juveniles should be fed 2-3 times per week, while adult tarantulas can be fed once a week or every other week. Always provide fresh water in a shallow dish. It is essential to ensure that feeder insects are gut-loaded with nutritious food before feeding them to your tarantula. This will ensure your tarantula is getting a balanced diet. Avoid feeding insects that have been exposed to pesticides or other chemicals. The appropriate diet and schedule ensures optimal growth and health.
Water and Hydration
Fresh water is essential for hydration. Provide a shallow water dish that is easily accessible to the tarantula. The water should be dechlorinated to remove harmful chemicals. Change the water regularly to prevent the growth of bacteria. In addition to a water dish, misting the enclosure can help to maintain humidity and provide another source of water. Some tarantulas may prefer to drink from the droplets. Clean water is vital for preventing dehydration and promoting health. Always ensure that the water dish is not too deep to prevent the tarantula from drowning.
Handling and Safety
Handling Cobalt Blue Tarantulas should be approached with caution. While they are generally not considered aggressive, they can deliver a painful bite if provoked. It’s best to avoid handling them unless absolutely necessary, such as during enclosure maintenance or health checks. If handling is required, do so carefully and slowly, always keeping the tarantula close to the ground to prevent injury in case of a fall. Avoid sudden movements and loud noises, as these can startle the tarantula. Always wash your hands thoroughly before and after handling your tarantula. Be aware of the urticating hairs, which can cause skin irritation.
Temperament and Behavior

Cobalt Blue Tarantulas are generally skittish and defensive. They may exhibit threat postures, such as raising their front legs and displaying their fangs, if they feel threatened. They are not typically aggressive but may bite if they feel cornered or provoked. They can also flick urticating hairs from their abdomen as a defense mechanism, which can cause skin irritation. It is important to respect their space and avoid handling them unnecessarily. Observing their behavior is part of the joy of keeping them. Understanding their temperament allows for better interaction and care.
Potential Health Issues and Prevention
Cobalt Blue Tarantulas can be susceptible to certain health issues. Maintaining proper environmental conditions is key to preventing illnesses. Regular enclosure cleaning and ensuring proper ventilation can prevent mold and bacterial infections. Monitor the tarantula’s behavior and appearance for signs of illness, such as lethargy, loss of appetite, or unusual postures. If you suspect your tarantula is ill, consult with a veterinarian experienced in treating exotic animals. Prevention through proper care and hygiene is crucial for the health and longevity of the tarantula.
Common Diseases and Ailments
Some common issues include fungal infections, parasitic infestations, and injuries. Fungal infections can arise from poor ventilation or excessive humidity. Parasites are less common in captive-bred tarantulas but can still occur. Injuries can result from falls or rough handling. Recognizing the symptoms early is crucial. Contact a veterinarian experienced in tarantula care immediately if you suspect an illness. A clean and well-maintained enclosure, combined with proper diet and care, helps to minimize the risk of diseases and ailments. Regular observation of the tarantula’s well-being is critical.
Breeding Cobalt Blue Tarantulas

Breeding Cobalt Blue Tarantulas can be a rewarding but complex process. Successful breeding requires careful planning and preparation. You will need to maintain adult, healthy specimens of both sexes. Breeding is usually successful in captivity, provided the environment and the tarantulas’ health are optimal. Before attempting to breed, it’s recommended to research and learn about the process thoroughly. Knowing the details of the breeding process will increase the chances of success.
Mating and Egg Sacs
The mating process involves introducing a mature male to a mature female’s enclosure. Observe the mating process closely. The female will typically produce an egg sac, which she will guard and care for. The egg sac typically contains many spiderlings, and after a few weeks, the spiderlings will emerge. You should remove the egg sac from the female if you are inexperienced to prevent the female from eating them. Rearing the spiderlings requires specialized care. Successful breeding requires patience and expertise.
Where to Buy a Cobalt Blue Tarantula
Cobalt Blue Tarantulas can be purchased from reputable breeders, exotic pet stores, and online retailers. Always ensure that you are buying from a source that prioritizes the health and well-being of the animals. Before purchasing, research the seller to verify their reputation and practices. Ask about the tarantula’s origin, age, and feeding habits. Examine the tarantula for any signs of illness or injury. By choosing a reliable source, you can minimize the risk of acquiring a sick or poorly cared-for animal.
Ethical Sourcing and Breeders

Ethical sourcing is vital for responsible pet ownership. Look for breeders who prioritize the health and welfare of their tarantulas. Inquire about the breeding practices, enclosure conditions, and health protocols. Avoid purchasing tarantulas from sources that may contribute to the overexploitation of wild populations. Supporting ethical breeders ensures that the tarantulas are raised in a responsible and sustainable manner. It also ensures the long-term well-being of the species in both the wild and in captivity. By making ethical choices, you contribute to conservation efforts and support responsible pet ownership.
Caring for a Cobalt Blue Tarantula is a rewarding experience. By understanding their needs and providing the right environment, you can enjoy these beautiful creatures for many years. Always prioritize their health, safety, and well-being, and your Cobalt Blue Tarantula will thrive.
