What is the Cobalt Blue Tarantula?
The Cobalt Blue Tarantula (Cyaneopubescens) is a captivating and highly sought-after species of tarantula, renowned for its striking iridescent blue coloration. Originating from the tropical forests of Southeast Asia, these spiders have gained popularity among arachnid enthusiasts due to their vibrant appearance and relatively manageable care requirements. Despite their beauty, it’s essential to understand that they are venomous creatures, and proper handling and responsible ownership are crucial. This guide aims to provide insights into the Cobalt Blue Tarantula, offering a comprehensive look at their characteristics, habitat, behavior, and care.
Appearance of the Cobalt Blue Tarantula
The Cobalt Blue Tarantula is a medium-sized tarantula, with females typically reaching a leg span of up to 5-6 inches. Males are often smaller. The most distinguishing feature of this species is its intense blue coloration, which covers its legs, carapace, and sometimes even its abdomen. This vibrant blue hue is not a pigment but rather the result of structural coloration, where microscopic structures on the spider’s exoskeleton scatter light, creating the illusion of blue. The rest of the body often features a contrasting black or dark gray color, enhancing the visual impact of the blue legs. The overall appearance is truly breathtaking, making it one of the most visually appealing tarantula species.
The Striking Blue Coloration

The unique blue coloration is the primary reason behind the Cobalt Blue Tarantula’s fame. This coloration serves as a form of camouflage, blending with the environment in its natural habitat. The intensity of the blue can vary depending on factors such as age, molting cycle, and lighting conditions. Newly molted tarantulas often display the most vibrant colors. The structural coloration is a fascinating example of how nature utilizes intricate physical structures to create stunning visual effects, far different from the pigments we see in many other animals. Observing these spiders up close is an opportunity to marvel at the beauty and complexity of the natural world.
Habitat and Distribution of Cobalt Blue Tarantulas
Cobalt Blue Tarantulas are native to the tropical regions of Southeast Asia, specifically found in countries such as Myanmar, Thailand, and Vietnam. They thrive in warm and humid environments, typically inhabiting burrows in the ground or under rocks and logs within the forest floor. Their natural habitat is characterized by dense vegetation, high humidity, and a relatively stable temperature range. Understanding their natural environment is crucial for providing appropriate care in captivity, as replicating these conditions is key to their well-being.
Where Do They Live?
These tarantulas are terrestrial, meaning they primarily live on the ground. They are burrowing spiders and create their own shelters. In the wild, they dig burrows in the soil or utilize existing crevices. They line their burrows with silk to create a comfortable and secure environment. They are typically found in areas with dense undergrowth and leaf litter, which provides both shelter and a source of food. These spiders are often solitary, except during mating season. Proper enclosure setup should consider their terrestrial and burrowing behavior.
What is their natural Environment?

Cobalt Blue Tarantulas thrive in hot and wet environments, particularly rainforests with year-round moderate temperatures. These conditions support their needs for humidity and offer protection from the sun. The availability of prey is another key aspect of their natural habitat. In the wild, they feed on insects, smaller invertebrates, and occasionally small vertebrates. Preserving these natural habitats is important.
Cobalt Blue Tarantula Behavior
Cobalt Blue Tarantulas are known to be a bit defensive and skittish, especially when compared to some other tarantula species. They are not typically aggressive, but they will readily defend themselves if they feel threatened. Their behavior can vary depending on individual temperament and environmental conditions. They are primarily nocturnal, most active during the night and spending the day hidden in their burrows. Understanding their behavior is important for safe handling and proper care. They’re fascinating creatures to observe, offering a glimpse into the intricate lives of these arachnids.
Temperament and Defensive Mechanisms
The Cobalt Blue Tarantula can be a bit unpredictable in temperament. They are not likely to initiate an attack, but they will likely exhibit a defensive posture if they perceive a threat. This can involve raising their front legs, exposing their fangs, and potentially flicking urticating hairs from their abdomen (though this is less common than in some other species). It’s crucial to handle them with care and respect their space. Their venom, while not lethal to humans, can cause painful bites. Prevention is key; always use a long pair of tongs when feeding and avoid sudden movements near them.
Feeding Habits and Diet of the Cobalt Blue Tarantula

In the wild, Cobalt Blue Tarantulas are opportunistic predators, feeding on a variety of insects and other invertebrates. Their diet consists primarily of crickets, roaches, mealworms, and other readily available prey. In captivity, their diet is typically kept similar to their natural feeding behaviors. They are ambush predators, waiting for prey to come within striking distance. A healthy diet is essential for their growth and well-being.
What do they eat?
Their diet should consist primarily of insects. Crickets are a staple, as are roaches. Mealworms and other larvae can also be offered, but these should be provided in moderation because of their higher fat content. The size of the prey should be appropriate for the tarantula’s size; the prey should not be larger than the tarantula’s abdomen. It’s important to provide a varied diet to ensure that the spider gets a balanced range of nutrients.
How often they eat?
Feeding frequency depends on the tarantula’s age and size. Spiderlings should be fed more frequently, typically every other day or every day. Subadults and adults can be fed less frequently, perhaps once or twice a week. Always remove any uneaten prey within 24 hours to prevent stress and maintain the cleanliness of the enclosure. Monitor your tarantula’s abdomen; a well-fed tarantula will have a round abdomen. If the abdomen appears small and shrunken, increase feeding frequency.
Cobalt Blue Tarantula in Captivity

Keeping a Cobalt Blue Tarantula requires a commitment to providing a suitable environment that mimics its natural habitat. Proper enclosure setup, temperature and humidity regulation, and feeding are crucial for their health and well-being. They are fascinating creatures to observe, but responsible ownership involves understanding their needs and potential risks. Being well informed is crucial for a rewarding experience.
Caring for a Cobalt Blue Tarantula
The enclosure should be appropriately sized for the tarantula. For adults, a 10-20 gallon terrarium is usually sufficient. The substrate should be deep enough for burrowing, typically 4-6 inches of a mix of peat moss, vermiculite, and coco fiber. Maintain a temperature of 75-85°F (24-29°C) and a humidity level of 60-70%. Provide a water dish and ensure the substrate is slightly moist. Handling should be kept to a minimum, and always handle them carefully. Regular cleaning of the enclosure is also necessary.
Common Health Issues
Like all tarantulas, Cobalt Blues are susceptible to certain health issues. Dehydration can be a concern, so always provide fresh water. Mites can sometimes infest tarantulas; if noticed, quarantine the spider and consult with an expert. Improper humidity can also lead to molting problems. Additionally, avoid any use of pesticides near the enclosure. Regular observation of your tarantula’s behavior and appearance can help identify and address potential problems early. Maintaining a clean and properly maintained environment is important.
Conclusion

The Cobalt Blue Tarantula is a remarkable species, celebrated for its stunning coloration and intriguing behavior. With the right care, they can thrive in captivity, bringing the beauty of the natural world into your home. Owning a Cobalt Blue Tarantula offers a fascinating opportunity to observe the intricate lives of these arachnids. Responsible ownership includes providing the proper enclosure, maintaining appropriate environmental conditions, and understanding their needs. By providing a suitable habitat and diet, and handling them with care, you can enjoy the beauty and wonder of this incredible species. If you appreciate exotic pets, the Cobalt Blue Tarantula is certainly a species to consider.
