Sling or Juvenile? Choosing Your First Tarantula in South Africa

Choosing your first tarantula is not only about species. The life stage matters too. A spiderling (“sling”) usually costs less and lets you watch the animal grow, while a juvenile is larger, easier to observe and often more forgiving for a new keeper.

There is no universal size at which a sling becomes a juvenile, so always check the actual specimen size and variant description before buying. Here is a practical way to decide.

What makes a sling appealing?

Slings are the smallest commonly sold life stage. They are usually the least expensive route into a species, and raising one through successive moults can be rewarding. They also need compact housing, so the initial enclosure can be simple and inexpensive.

The trade-off is attention. Very small slings can be difficult to see, may burrow for long periods and need suitably tiny prey. Their small enclosures can dry more quickly, so hydration and ventilation need regular checks. Specialist keeper Tom Moran notes that the smallest slings are more difficult to monitor and more vulnerable to husbandry mistakes; his spiderling husbandry guide recommends researching the exact species rather than applying one routine to every sling.

Why a juvenile can be easier

A juvenile is larger and more established. It is generally easier to locate in the enclosure, observe body condition and offer appropriately sized feeders. A larger specimen can also make routine maintenance less nerve-racking for someone who has never kept a tarantula.

The main disadvantages are price and availability. Juveniles have already required months or years of feeding and care, and confirmed females can carry an additional premium. Do not assume that “juvenile” automatically means beginner-friendly: a fast or defensive species remains a poor first choice regardless of size. Choose the species first, then the stage.

A live South African price example

As checked on 23 September 2026, Tarantula Den has both stages of the Green Bottle Blue (Chromatopelma cyaneopubescens) available: a spiderling at R400 and a juvenile female at R800. That difference is not caused by stage alone—the juvenile is also sexed female—but it shows why the label, size, sex and price should be considered together.

Other currently available examples include a Chaco Golden Knee spiderling at R55, a Mexican Red Knee spiderling at R120 and a Mexican Fire Leg juvenile (unsexed) at R200. Prices and stock can change, so check the selected variant immediately before ordering.

Which should a first-time keeper choose?

• Choose a juvenile or larger sling if you want easier observation, simpler feeding and a little more margin while learning.
• Choose a sling if budget matters, you enjoy patient growth projects and you can check a small setup consistently.
• Pause before buying if the listing does not give enough information about species, stage or size.

Whichever stage you choose, prepare a secure, well-ventilated enclosure before the animal arrives. Provide species-appropriate substrate, a hide or starter burrow and reliable access to water. The British Tarantula Society’s feeding guidance notes that spiderlings feed more frequently than adults, while its handling policy supports observation rather than routine handling.

The short answer

For many cautious first-time keepers, a juvenile—or at least a well-established, larger sling—is the easier starting point. A sling can still be a good first purchase when you understand the extra monitoring involved. Start with the Beginner Tarantulas collection, confirm live stock and stage, then read the individual species information before choosing.