Even if their just mobs, their pretty tough...just posting how to tank em, where, and what kind of pulls there may be...http://www.wowwiki.com/Serpentshrine_Cavern (scroll down to "Mobs")
I mentioned this in raid chat last night but figure it'd be good to put up here.
Warriors tanking Coilfang Shatterer, trash mob on way to Lurker, can reflect the Shatter Armor ability(spell). This ability reduces a targets armor by 50% and melee damage by 33%. Help your healers and make sure to reflect this ability whenever.
Now if I only had this ability when dueling with Arc in bear form......