This flat reef is located approx 1/4 mile from Sumay cove on Naval Station. The reef peaks at 60 feet and slopes on all sides down to the bottom of the harbor at about 120 feet, the reef is rectangular shaped and lays east to west.
This reef is home to at least 30 large (3 to 4 feet) sponges that resemble elephant ears. Most of them are colored a bright iridescent blue and violet.
A 25,000-lb. anchor sits upright on the top of the reef. It is assumed that it was used for a mooring of some type, but no one knows for sure. Many small anemones are on top of the reef. This is a "scrounge” reef and many small war artifacts can still be found around the reef.
Elephant Ear Sponges are brightly colored, rigid and, as their name implies, look like elephant’s ears. These great fan-like sponges often span 7-8 feet and have multicolored, thin ribbed surfaces that look like large ribbons. Sponges are natural reef water cleaners. They can be found singly as well as in groups in the deeper portions of Apra Harbor.