Tarantula Profile Cobalt Blue

Cobalt Blue Tarantula Information

The Cobalt Blue tarantula is probably one of the most well-known names in the industry, and it has always been at the top of the list for many tarantula keepers and breeders. The fact that you almost never see them doesn’t seem to deter anyone from getting one because when you catch a glance of it in all its blue magnificence, the term Cobalt Blue certainly does it justice.

In most cases, hardly more than a pet hole, this fossorial old world species prefers to spend its day below, only appearing at night or when food is available. They eat well and develop quickly; I had one that grew from a sling to an adult man in one year without power feeding. They are particularly sensitive and defensive while they are out and about. It doesn’t take much to see a threat pose displayed by a Cobalt Blue tarantula.

Cobalt Blue Tarantula

Care Requirement

The cobalt blue tarantula can be found many feet below the surface in the nature, so don’t worry about them having too much to dig through. If you keep this species in an acrylic or glass enclosure the size of a 10- or 20-gallon aquarium, you’ll be able to see the tunnels and webbing that may form if they dig along the sides. A mix of peat moss, coco fiber or soil (free of chemicals and additives) will provide an adequate environment for your tarantula to burrow in.

This species does not require hides because they will dig their own holes. Some keepers like to make a slight indentation in a certain region of the cage to encourage burrowing in that region. Anything else done for ornamentation is only for the advantage of the keeper. As previously said, the cobalt blue tarantula is quite fast; allowing for some length in your cobalt blue’s enclosure enhances the likelihood of your tarantula racing back into its den rather than up and out of your cage.



For this species, the temperature should be between 78 and 84 degrees Fahrenheit, with a humidity level between 70 and 80 percent. Moistening the substrate twice a week can assist in achieving these levels. If heat is required, a heat mat on the side of the enclosure would suffice, but be careful to control temperatures using a thermostat and always leave a chilly side for your tarantula to retreat to.

Cobalt Blue Tarantula


Making an appropriate environment is the first step in providing good cobalt blue tarantula care. The housing of the cobalt blue spider is quite simple: provide lots of substrate for the spider to burrow in. 8 inches of moist ground is sufficient for adult specimens, however deeper is usually preferable.


Food and Water

Tarantulas are hunters that require live prey to survive. Adults can eat crickets and other large insects that are pesticide-free. Adult tarantulas eat once or twice a week, whereas juvenile spiders can be fed more frequently. While these tarantulas can consume a large number of insects, they may also go for extended periods without feeding.

Feeding them appropriately also entails maintaining pet crickets beside your spider and feeding them a diet that maximizes your pet’s nutrient intake. Some keepers propose feeding a full-grown spider a pinky mouse every now and again, although the calcium in the mammal’s bones may outweigh the spider’s dietary requirements. As a result, supplementing with this food source in captivity is not advised.

Provide a flat ceramic pan of clean, clear, and chlorine-free water; avoid deeper dishes as they create a drowning hazard for tarantulas. However, take care to avoid spills when refreshing it, as this species will become stressed if their tank substrate is wet.

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