Spider Class Arachnid Spiders are part of the Arachnid class and are found in all of the inhabited world. 40,000 species are listed in the world's fauna.
Every spider is venomous, but a very small number of species are really dangerous.
They mostly live near the ground, in holes, under rocks or in holes in trees, while some like river banks and even the sea. Most are solitary, but some live in communities. They build collective webs where many individuals live. It should be noted that they are all carnivorous. Generally speaking, the inoculation of their venom causes a painful inflammatory reaction.