Beach Fort Moarsman Fort
From Drunkapedia
Guard Al'Zira (75.9N 49.1W in Beach Fort) tells of a moarsman fort nearby on the beach. Located at 75.1N 49.6W. The fort is filled with Tainted Putrid Moarsmen.
Killing all the Moarsmen in the fort causes a few Coral Encrusted Chests to spawn at the top of the Temple. They contain a Large Tainted Egg, use of the chest is on a 6 day timer.
The chests disappear when the Moarsmen respawn after a couple minutes. See Moarsmen on the Shores for more details.