#5 Sydney Funnel-Web Spider
Sydney Funnel Web Spiders are one of the most dangerous spiders around the globe but, luckily (or unluckily), it’s native to Australia.
Amazingly, they have fangs larger than a brown snake. They also produce a toxic, fast-acting venom that could also be fatal, with 13 deaths recorded before the antivenom was developed.
Their venom contains a neurotoxin that attacks the nervous system and causes circulatory problems, muscle spasms, and diarrhea within an hour of being bitten, requiring fast action.