|The Goliath birdeater (Theraphosa blondi) is listed in The Guiness Book of World Records as being the largest species of spider in the world, with a legspan of up to 13 inches. This is under dispute though, as there are some close contenders. Moreover, the study of tarantulas is still a fairly new discipline and there are some species that still merit further study.|
This is a fairly aggressive species, though not as bad as some Asian and
African tarantulas. From what I've heard, its venom is not particularly
toxic; however, because of its size, it can inject a prodiguous amount of
venom. Moreover, its fangs can be over an inch long, and so the
mechanical damage from its fangs can be very extensive indeed.
ELISPOT, ELISA assay plates