Underwater writing slates were used to record the different species adhering
to the top, side and interior roof of pipes over time.
Image ID: reef0158, NOAA's Coral Kingdom Collection
Location: Pokai Bay, Oahu
Photo Date: August 1969
Photographer: Dr. James P. McVey, NOAA Sea Grant Program
Category: Coral Reefs/Marine Biologist/Artificial Reef/Diving/
• High Resolution Photo Available