A tarantula can be chosen by researching proper care techniques, understanding the difference between each species, and selecting a species that best fits the owner's environment. Tarantulas.com suggests purchasing a tarantula bred in captivity to improve health and longevity.
Care for each species is similar, but some are more sensitive to humidity, temperature and social differences. A tarantula that prefers a warm, humid environment should not be chosen if the owner lives in a cold, dry climate. Tarantulas with harmful defense techniques should not be chosen for homes with small children or other animals. Tarantulas.com offers a comprehensive tarantula care guide and suggests reading "Tarantulas and other Arachnids" by Dr. Sam Marshall to better understand the differences between each species.