Uploaded February 2024 | Updated September 2026, 2 weeks ago

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This “big red jelly" (Tiburonia granrojo) was observed during the 900-meter (2,950-foot) transect to explore the water column on the first dive of the Seascape Alaska 3 expedition. Unlike other jellies, big red jellies use fleshy "feeding arms," visible in this video, instead of stinging tentacles to capture food. Living up to their “big red” common name, these jellies can be over one meter (three feet) in diameter.

Learn more about the expedition: oceanexplorer.noaa.gov/okeanos/explorations/seascape-alaska/ex2304/welcome.html

Video courtesy of NOAA Ocean Exploration, Seascape Alaska