The biggest spider in the world is the goliath bird-eater spider.
The Goliath birdeater belongs to the tarantula family Theraphosidae.
Found in northern South America, it is the largest spider in the world by mass – 175 g – and body length – up to 13 cm – but it is second to the giant huntsman spider by leg span.
The worlds most deadliest spider is the wandering spider.
Wandering spiders are a family of spiders that includes the Brazilian wandering spiders.
These spiders have a distinctive longitudinal groove on the top-rear of their oval carapace similar to those of the Amaurobiidae.
They are highly defensive and venomous nocturnal hunters.
The wandering spiders bite, which delivers neurotoxic venom, can be deadly to humans, especially children, although antivenom makes death unlikely.
Because they are aggressive and have a venomous bite, it is advised not to keep this species as a pet.
This species of spider is not like Tarantulas.
Although they do have venom, they are harmless to humans.
The Wandering Spider is the world's deadliest spider.
The Wandering Spider is a large brown spider that is similar to the North American Wolf Spider but the Wandering Spider is bigger and has a more toxic venom than the American Wolf Spider.