Revisiting a Whale Fall on Clayoquot Slope | Nautilus Live

During our NA151 expedition to the waters off British Columbia, OET and Ocean Networks Canada (ONC) revisited the site of a whale fall 1,250 meters deep at the Clayoquot Slope Bullseye site to see how the ecosystem has progressed over the years. Whale falls represent an oasis of food supply in an often food-poor deep-sea floor and sustain a diverse assemblage of marine organisms for up to decades. ONC has been observing this particular whale fall since 2012 during its yearly visits to maintain the observatory’s seafloor instruments at Bullseye, where scientists are also interested in studying and monitoring the processes controlling methane gas seeping from the seafloor. This expedition repeated a photogrammetry survey, which was also performed in 2012 and in 2020 to take high-resolution videos of the entire whale skeleton, allowing the estimation of whale bone decomposition over a decade period. This site, which was originally discovered in 2009 by an expedition led by the Monterey Bay Aquarium Research Institute, includes the ~16m long whale skeletonand associates such as Cocculina craigsmithi (gastropod), Mitrella (Astyris) permodesta (bucinoid gastropod), Ilyarachna profunda (isopod), Paralomis multispina (crab), Coryphaenoides acrolepis (rattail fish), and Lamellibrachia cf. barhami (tube worms). Learn more about our NA151 expedition in partnership with Ocean Networks Canada: E/V Nautilus is exploring unknown regions of the ocean seeking out new discoveries in biology, geology, and archaeology. Join us 24/7 for live video from the seafloor and to ask questions of our explorers currently aboard Nautilus: . Follow us on social media for dive updates, expedition highlights, and more: Subscribe on YouTube: Facebook: Twitter: Instagram: TikTok: @NautilusLive