Tarantulas have become increasingly popular exotic pets. While their welfare needs differ fundamentally from vertebrate pets, understanding their requirements prevents preventable suffering.
Tarantula welfare problems most commonly stem from inappropriate humidity management, which can cause fatal complications during molting when the exoskeleton fails to shed correctly. Wild-caught individuals suffer significant mortality during collection, transport and acclimatization. The handling of tarantulas causes measurable stress responses - while less obvious than mammalian distress, the urticating hair release and threat posturing are behavioral indicators of aversion. Social housing causes competition, predation and chronic stress. Many tarantulas are kept in excessively small enclosures that prevent natural burrowing or climbing behaviors depending on species. The exotic pet trade in tarantulas drives continued collection from wild populations for many species where captive breeding is insufficient.