[h=2]Spiny orb-weaver, Gasteracantha cancriformis[/h] The spiny orb-weaver spider is one of the most colorful and easily recognized spiders in Florida. The dorsum of the abdomen is usually white with black spots and large red spines on the margin. Females are 5 mm to 10 mm long and 10 mm to 14 mm wide. The webs typically contain tufts of silk, which may prevent birds from flying into them.
Thanks Marilynne,
I've also always called them crab spiders but didn't know if that was what they where actually called or not, so I made something up.
I'm going to try to remember Spiny orb-weaver from now on.