April 28, 2016 — On a recent research expedition in Alaska, scientists aboard the R/V Norseman II conducted the first-ever deepwater exploration of Glacier Bay National Park and Preserve. Using both surveys by scuba divers and the remotely operated vehicle (ROV) Kraken2, scientists found an abundance of cold-water corals and associated organisms that use these corals as habitat, from the very bottom to the top of the submerged portion of the fjords. Prior to the expedition, little was known about ecosystems in the depths of the fjord and records of corals were sparse. Led by Rhian Waller, Ph.D., of the University of Maine, this project was funded as part of NOAA’s Office of Ocean Exploration and Research’s 2014 Federal Funding Opportunity.
“This expedition was incredibly exciting. Not only did we find abundant cold-water coral communities at both deep and shallow depths, we recorded species new to this area and abundant life living around these corals, and we documented and took imagery for the first time of cold-water coral ecosystems existing within one of our national parks,” said Waller when asked about the success of the expedition.
Throughout the expedition, scientists were struck by the size of the corals, some estimated to be up to three meters tall, and the amount of corals observed on nearly every ROV dive and the majority of scuba surveys. Stony corals were also observed for the first time within the park, and a species of stoloniferous octocoral – a type of encrusting coral – was found at greater depths than has been observed anywhere else in the world.