When I was a kid we had monster that would find its way into our pool every year at about the same time.It was always fun trying to fish it out of the pool laugh This went on for years and then one year it never returned.

I don't know how true this is but my dad told us it was a female going to lay her eggs.Supposedly they use the same route every year.Since she showed up the first year we had the pool and dropped in every year for 10-15 years after.We just assumed the pool was built in her way and I never questioned it.Though I still wonder about it to this day.