What is the most venomous spider in the world?

The most venomous spider in the world is widely considered to be the Brazilian wandering spider (Genus Phoneutria).

  • Venom Potency: Its venom contains a complex cocktail of toxins that affect the nervous system. It is a potent neurotoxin.

  • Symptoms: A bite can cause extreme pain, swelling, increased blood pressure, heart palpitations, blurred vision, convulsions, and in men, priapism. Deaths are rare due to available antivenom, but the bite is a serious medical concern.

  • Habitat: These spiders are native to South America and Central America. They get their name from their tendency to wander rather than build webs, often hiding in dark, moist places like shoes, clothing, and banana bunches.

  • Danger: While highly venomous, deaths are relatively rare due to the availability of antivenom and the fact that not all bites result in significant envenomation (dry bites). However, their aggressive nature and tendency to wander into human dwellings make them a significant concern.