Cecile Reef is a rocky land mass off the coast of Silesia and very close to the edge of the Granacliffs. It is a major hatching site of the Crimson Claw monsters who lay eggs that look like giant pearls all around the reef.
Ryudo and party rest here overnight before crossing the Granacliffs owing to the lack of wind to lift them the day before. However, they find themselves surrounded in the night when the Crimson Claw eggs hatch and the hostile young attack them. Due to the high tide, they cannot return to their ship the way they came so must find another route back.