Ice diving in the Arctic requires special equipment and a smart dive plan. Diver riding a shrimp net watches a turtle escape through the excluder device. Elkhorn and staghorn corals provide beauty and complexity to the reef. Divers collect shallow sediment cores to track coastal erosion processes. Close-up underwater photography of coral reefs can only be done by divers.
Divers use a suction sampler to collect animals living in the sand.
School of jacks patrol the reef. Deploying a plankton net in a kelp forest to collect larval fish. Technical diver, using mixed gases to dive to 60 meters, decompresses. Diver carries samples to the surface. 1975 August 218.