Spiders have a life cycle, and reproduce by laying many eggs.
We can count by ones, twos, fives, or as many as we want. Spider Magic by D.H. Patent. We have been collecting and observing spiders for several days now. Yes, some of them have died, but we keep on bringing new ones into our vivarium. New spiders have to be born, otherwise we would run out of spiders, and we have many of them all the time.