The pantropical huntsman spider, Heteropoda venatoria (L.), sometimes called the giant crab spider or the banana spider (due to its occasional appearance in marketed bananas), is a cosmotropical species introduced into and now occurring in the U.S., in subtropical areas of Florida, Texas, and California, and in coastal areas of Georgia and South Carolina. It is presumed to have been introduced from Asia, where many of its closest relatives live (Gertsch 1948). It is sometimes mistaken for a large brown recluse, Loxosceles reclusa Gertsch and Mulaik, a venomous spider in the family Sicariidae, but it is neither related nor is it dangerous. Some authors placed this spider in the family Heteropodidae, due to the uncertainty of the name Sparassidae (Platnick and Levi 1973), but the family name Sparassidae was stabilized by Jãger (1999).
Females of Heteropoda venatoria make flattened, disc-like eggsacs about 1.5 cm in diameter which contain over 200 eggs. The eggsac is carried under the body, its size and shape probably causing the female to remain relatively immotile. All stages of development of juveniles and adults appear to occur simultaneously throughout the year.
This and similar species are highly valued in tropical countries because they capture and feed on cockroaches and other domestic insect pests. As with other vagrant spiders, pantropical huntsman spiders do not use webs to capture prey. Their great speed and strong chelicerae (jaws) are used to capture the insects on which they feed. Venom is also injected into the prey from glands extending from the chelicerae into the cephalothorax.
The flattened body enables this large spider to fit into surprisingly small cracks and crevices. This ability, along with its adaptability to human habitations, helps explain its frequent occurrence in houses, barns, sheds, under boards on the ground, and in other sheltered areas. Being cold-sensitive, these spiders cannot exist outdoors in areas with freezing winter temperatures; occasionally they occur in greenhouses and other heated buildings in temperate climates. On the other hand, in southern Florida where frost is rare, these spiders have become "wild" (i.e., no longer requiring man-made structures). In the Homestead area, Heteropoda venatoria is now established in the "wild" and is common in avocado groves (Whitcomb unpublished). They can be easily collected at night by using a headlight (Wallace 1937) as their eyes reflect light, appearing as blue spots on the trunks of trees and on the ground, much like wolf spiders.
Information obtained from http://entnemdept.ufl.edu/creatures/urban/spiders/giant_crab_spider.htm