It is very easy to tell the difference between a crab and a spider usually. However, there are sometimes issues that are thrown up by genetic mutations in nature. The crab spider is one such abnormality. It doesn’t resemble your average spider; indeed, if it wasn’t for the number of legs you could be forgiven for believing that it was a crab! Even the front few legs look suspiciously like claws (although they aren’t as wide at the end). One other interesting feature about these crab spiders is that they do not move like normal spiders; instead of general forwards motion the spiders move sideways, much like crabs do. This does little to help to distinguish between the two species when you see it!
Also unlike normal spiders, they do not build webs in order to trap their prey. Instead, they choose to ambush the unsuspecting prey by using traps or by positioning themselves in various places. Often, they can be found in and amongst leaves or berries; prime locations that insects and bugs frequent daily. When an insect strays within range the spider uses its powerful front legs to hold it down as venom is injected into it through the spider’s teeth; thus paralyzing the insect. Fortunately for humans, the crab spider is not deadly to humans. However, a related genus, which is often mistaken for the crab spider, is poisonous so it is best to avoid the spider unless you are completely sure; it is better to be safe than sorry!