It is also called a Black and Yellow Garden Spider, Argiope aurantia, the spider from Charlotte's Web. All Spiders have venom, but very few will bite people and even fewer are dangerous. The Garden Spider minds its own business and stays in it web. It is not aggressive. - http://www.whatsthatbug.com/2009/08/20/19208/
there are many types of spiders that look like that. Take pictures and indentify then.
Most catilppilars are green with black stripes but you may be looking at a Crossstriped Cabbageworm.
black swallowtail
The spider you are describing is likely the Bahamian wandering spider (Ctenidae sp.). This species is known for its large size, black coloration, fuzzy appearance, and distinct white stripes. It is common in the Bahamas and is known for its wandering behavior rather than building webs.
If the stripes are light in color, maybe even off white it could be a CA king snake.
zebra fish
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>.< all spiders have equal sized legs and too there are a ton of species of spiders that are black
There are probably about a hundred thousand different small black spiders on Earth.
Eastern Lubber Grasshopper.
Garder-snake; multi color green, yellow and black stripes length of body.
the worst kind