Vietnam Blue Tarantula: Health, Temperament, Care & Costs

The Vietnam Blue Tarantula, commonly sold in the hobby as Chilobrachys dyscolus “blue,” is an Old World, ground-dwelling burrower from Southeast Asia. Adults usually reach about a 5 to 6.5 inch leg span, with females living much longer than males. In captivity, females may live around 12 to 14 years, while mature males often live only a few years after reaching adulthood.

This is not a handling species. Vietnam Blue Tarantulas are known for being fast, defensive, and highly reclusive. Many spend much of their time in deep burrows, so pet parents often describe them as a “pet hole.” That said, their metallic blue leg coloration and dramatic feeding response make them very appealing to experienced keepers.

Their care centers on secure housing, deep moisture-retentive substrate, a hide or starter burrow, steady access to water, and tropical humidity without stagnant air. Because Asian tarantulas can deliver a painful bite and stress easily, calm maintenance and minimal disturbance matter as much as enclosure size.

For most households, this species is best for experienced invertebrate keepers who enjoy observing natural behavior more than frequent interaction. If your tarantula stops eating, stays out in the open unusually long, shows trouble molting, or develops a shrunken abdomen, schedule a visit with your vet who sees exotic pets.

Vietnam Blue Tarantulas do not have breed-specific inherited diseases documented the way dogs and cats do, but they are very sensitive to husbandry errors. The most common health problems in captivity are dehydration, failed molts, trauma from falls, stress after repeated disturbance, and feeder-related injuries. Cornell’s tarantula care guidance notes that tarantulas should not be left dry, need access to water, and can be injured or killed by crickets left in the enclosure during a molt.

Molting problems are one of the biggest concerns. A tarantula that is too dry, weak, stressed, or disturbed may struggle to complete a molt. Signs that warrant prompt veterinary attention include being stuck in the old exoskeleton, leaking fluid, inability to stand after a molt, or a markedly shrunken abdomen. Young spiders are often more fragile during this stage.

Trauma is another major risk. Tarantulas are delicate despite their tough appearance, and a short fall can rupture the abdomen. This is one reason experienced keepers avoid handling. A secure enclosure with low climbing opportunities and soft, deep substrate lowers risk.

There is also a human and household safety angle. Merck Veterinary Manual notes that Asian tarantulas can cause a painful bite with localized swelling, and tarantula hairs can irritate skin, mucous membranes, and eyes. If your tarantula escapes, is injured, or anyone in the home has an eye exposure or bite, contact your vet or physician right away.

A Vietnam Blue Tarantula is often less costly to maintain than many mammals, but setup quality matters. In the U.S. in 2025-2026, a captive-bred sling commonly costs about $40 to $90, juveniles often run $80 to $150, and confirmed females may range from roughly $180 to $350 or more depending on size, lineage, and availability. Overnight live-animal shipping commonly adds about $20 to $50.

A practical initial setup usually costs about $80 to $220. That may include a secure terrestrial enclosure, deep substrate, cork bark or another hide, water dish, feeder tongs, and basic monitoring tools. Ongoing monthly care is often modest, around $5 to $20 for feeders and substrate replacement averaged over time, though costs rise if you maintain multiple feeder colonies or upgrade enclosures.

Veterinary costs are the least predictable part of the budget. Exotic pet exams in the U.S. commonly fall around $75 to $150 for a first visit, and some general exam visits are often around $50 to $100 depending on region and clinic. Emergency or specialty exotic care can be much higher, especially after-hours. Because tarantulas hide illness well, it helps to keep an emergency fund even if routine costs are low.

If you are comparing options, the most budget-friendly path is usually a captive-bred juvenile from a reputable source rather than a mature imported specimen. Younger spiders are often less costly up front and may adapt better to captive conditions, though they require patience and careful feeding.

Vietnam Blue Tarantulas are insectivores. In captivity, they are usually fed appropriately sized crickets, roaches, or occasional flies. Prey should be smaller than the tarantula’s body length, especially for spiderlings and juveniles. Cornell guidance for tarantulas supports feeding once or twice weekly based on hunger level, with crickets or flies often preferred over mealworms or superworms.

A healthy feeding routine depends on age and body condition. Spiderlings may eat every 3 to 7 days, juveniles every 5 to 10 days, and adults often every 7 to 14 days. Some adults will fast for weeks, especially before a molt. That can be normal, but a prolonged fast paired with a shrinking abdomen, weakness, or trouble moving deserves a call to your vet.

Fresh water should always be available in a shallow dish, even in humid enclosures. Hydration matters. A tarantula may drink more than many pet parents expect, and dehydration can contribute to weakness and molting trouble.

Do not leave live feeders in the enclosure when your tarantula is premolt or actively molting. Crickets can injure a vulnerable spider. Remove uneaten prey within about 24 hours, and avoid overfeeding to the point that the abdomen becomes excessively large and more prone to injury if the spider falls.

Vietnam Blue Tarantulas do not need exercise sessions the way dogs, birds, or ferrets do. Their normal activity is short bursts of walking, digging, webbing, and ambush hunting inside a secure enclosure. The goal is not to make them more active. It is to give them enough space and structure to perform natural behaviors safely.

This species is fossorial, meaning it prefers to burrow. Deep substrate is more important than a large footprint. Many keepers offer 6 or more inches of moisture-retentive substrate for juveniles and adults, along with cork bark or a starter burrow. A cramped enclosure can limit natural behavior, but an overly large enclosure can make feeding and monitoring harder.

Handling is not enrichment for this species. In fact, it increases stress and injury risk. Cornell notes that tarantulas are delicate and can die after a fall, which is why many experienced keepers do all transfers low to the ground with cups and tools ready.

Good enrichment is subtle: stable substrate, a dark retreat, low disturbance, and a predictable day-night cycle. If your tarantula suddenly paces the enclosure, climbs excessively, or abandons its burrow for days, review temperature, moisture, ventilation, and prey management, then check in with your vet if the behavior continues.

Preventive care for a Vietnam Blue Tarantula is mostly husbandry-based. Keep the enclosure secure, provide deep clean substrate that holds some moisture, maintain a water dish, and avoid dramatic swings in temperature or humidity. Tropical tarantulas generally do best with steady warmth and moderate-to-high humidity, but they still need airflow so the enclosure does not become stale or moldy.

Routine observation is your best health tool. Watch for changes in appetite, posture, abdomen size, webbing, burrow use, and molting pattern. A healthy tarantula may hide often, but sudden weakness, inability to right itself, fluid loss, or a collapsed-looking abdomen are red flags.

Clean conservatively. Spot-clean prey remains, remove moldy substrate patches, and refresh water regularly, but avoid frequent full tear-downs that destroy the burrow and create repeated stress. Quarantine new feeders or feeder colonies when possible, and never use pesticides near the enclosure.

Plan ahead for veterinary access before there is a problem. Not every clinic sees arachnids, so it helps to identify your vet with exotic experience early. Bring photos of the enclosure, recent molt dates, feeding history, and any behavior changes to the visit. That information can be very helpful when signs are subtle.