A type of species found in almost every Zone of the The Seven Realms, some regions more, other regions not at all. They live in and close by the waterside. They are several sub species of Pelogs too.
Pelogs are mobs who will always stay at the same spot. When you are 5 levels higher or lower, they will not attack you anymore.
A summary of all the Pelogs in the game can be found at Category:Pelog.