Underwater writing slates were used to record the different species adhering to the top, side and interior roof of pipes over time.

Image ID: reef0155, NOAA's Coral Kingdom Collection
Location: Pokai Bay, Oahu
Photo Date: July 1969
Photographer: Dr. James P. McVey, NOAA Sea Grant Program


Category: Coral Reefs/Marine Biologist/Artificial Reef/Diving/

• High Resolution Photo Available