Tarantula is a type of monster in ADOM. They are arachnid monsters that spin webs, and can poison the PC upon damaging attacks. On top of the nasty effects of poisoning, tarantulas are quite dangerous opponents in the early game anyway due to their surprising strength and toughness. Whilst a lone tarantula might not be too hard to deal with, unlucky PCs might often find themselves surrounded by them should they encounter a dark elven wizard or other elven caster.