where are the spiders in the UW?

could somoen give me a map...? i need a lvl 20 pet and theres no way im gonan easily be able to train my crummy levle 9 as a lvl 20.. X.x;; (and yes ive been trying - plus spiders are just plain cool!)

One of the quests drops a chest with a Black Widow in it, at the end.

so thats the only place? and is there anyway to get there quickly (several of the rangers in the Amazon Basin are wanting a spider, so it would be good if there is only one fo them to have a fast way to get them all)