NPS Submerged Resources Center


Did you know Yellowstone uses an underwater remotely operated vehicle to study the spawning habits of invasive lake trout in order to eradicate them? Park scientists locate spawning beds deep in Yellowstone Lake by tagging select "Judas fish" with radio transmitters and tracking their movements. Once we know where they spawn, employees from the NPS Submerged Resources Center like Dave Conlin dive in to document the spawning beds with photos and video.

"Diving in the lake is cold and difficult. Water temperatures can be near freezing. That means you wear thermal protection under your drysuit and a lot of lead weight to offset it. Climbing into the boat with all that weight at an elevation of 9,000 feet leaves everyone gasping for air. But it's 136 square miles of the park that few get to experience above the water, let alone dive in." - Dave Conlin, Submerged Resources Center Chief

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Last updated: May 5, 2021

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Yellowstone National Park, WY 82190-0168



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