The main thing that makes spiders different from other animals is that they spin webs to catch the small insects they feed on.The unique silk of a spider's web is produced by special organs found in the lower part of the spider's body.It is light,elastic,and strong-spider web is five times stronger than steel.Additionally,it is completely biodegradable.This means that the web will completely decompose and eventually return to nature over time-making it perfect for uses such as making fishing nets.Some people have tried to raise spiders commercially in order to collect the silk these spiders produce,but no one has ever really managed to make a go of it.One reason why these businsses never stand a chance is because it takes 670000 spiders to produce half a kilogram of silk,and all of these spiders need living insects for their food.In addition,spiders are usually solitary animals,and need to be kept alone.