Quite some time ago I speculated that the ability would be a "blind", to double-up the monkey ability. It would seem I'm about to get proven wrong. According to the 4.0.6 PTR patch notes, shale spiders will get
"Web Wrap". This is the same ability used in Azjol-Nerub ("AN") where someone gets all webbed up and has to be broken out (or sit tight for 10sec). MMO was wrong. Cialbi found the actual
Web Wrap ability. Sorry for the confusion.
It's an interesting choice, and I imagine shale spiders will become quite a popular PvP pet as a result, given they have the "Blessing of Kings" equivalent as their exotic ability. Well, that is assuming that BM spec is actually viable - I seem to be a sitting duck to any mage who has silence & poly on their bar...