My subconscious is smarter than me

I had a dream last night that involved fleeing from poisonous nematodes. The details of the dream are too silly to recount, but there definitely were nematodes. So I woke up thinking, what is a nematode anyway and why did that word get into my dream?I vaguely remembered that it was a sort of worm. Today I looked it up and confirmed this. But I don't recall ever studying them in Biology or anything. I guess my subconscious knows a few things I slept through.