If you're ever questing in the Wetlands and have to do one of the numerous "kill small/medium/giantsized crocs" quests I have a trick. Walk out of Menethil Harbor and make an immediate right - directly into the drink.
All types of crocs swim in this watery inlet. The young ones are closest and the giant ones are furthest. No more dodging murlocs, invisible Fen Creepers or Hogger wannabes to find one or two croc mobs.
For those with no special underwater breathing abilities, I recommend a nice Elixir of Water Breathing. Some of those giant crocs like to hide near the bottom.