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The titan4 arm of Jason reaches for the osmotic fluid sampler in the ASHES hydrothermal field. Fractures in the lobate lava flows leaking warm fluids support colonies of whte bacteria and small tube worms. The HD video camera is in the background. Credit: UW/NSF-OOI/WHOI. V20

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A sablefish lounges on the zooplankton sonar platform at the Oregon Shelf site (80 m). Credit: UW/NSF-OOI/WHOI. V20.

A lingcod rests atop the zooplankton sonar platform at the Oregon Shelf site (80 m water depth). Credit: UW/NSF-OOI/WHOI. V20.

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A brush is used to clear away anemones that are hiding access to the junction box at the Oregon Shelf site. Credit: UW/NSF-OOI/WHOI; V20

The MJ01C junction box at the Oregon Shelf site is completely encased in anemones. Credit: UW/NSF-OOI/WHOI; V20.

Chief Scientist Brendan Philips oversees work on the fantail of the R/V Thompson as the ship prepares to sail again to complete Regional Cabled Array work for 2020. Credit. J. Tilley, University of Washington. V20

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Chief Scientist Brendan Philip inspects a Benthic Experiment Package onboard the R/V Thompson. Credit. J. Tilley, University of Washington. V20

A wall of monitors inside the Jason control van provide a wealth of information to Jason and the RCA Science-Engineering team. Here, the ROV is installing a sensor into the high temperature vent 'Diva.' Credit: University of Washington. V20.

The Benthic Experiment Package recovered after a year-long deployment comes aboard the R/V Thompson latched beneath the ROV Jason. Credit: University of Washington. V20.

Chief Scientist B. Philip and engineer I. Borchert process water samples from the Slope Base site. Credit: University of Washington. V20.

The R/V Thompson heads under Yaquinna bridge at the end of Leg 1. Credit: University of Washington. V20.

The R/V Thompson coming into port after nearly there weeks at sea on VISIONS'20. Credit: B. Philip, University of Washington.

A clump of healthy tubeworms encased in limpets grow in the International District Hydrothermal Field. Credit: UW/NSF-OOI/WHOI. V20.

A NSF-funded CTD is reinstalled in the ASHES vent field as part of an award to Dr. Bill Chadwick (OSU). Credit: UW/NSF-OOI/OSU/WHOI. V20.

The summit of the active hydrothermal chimney is covered in a dense community of tubeworms, palm and scale worms, blue ciliates and white filamentous bacteria. Credit: UW/NSF-OOI/WHOI.V20

The cabled high definition camera reinstalled at the base of the Mushroom vent during VISIONS'20. Credit: UW/NSF-OOI/WHOI.20.

Small chimlets sprout from the top of Mushroom, covered in blue ciliates, palm and tubeworms and limpets. Credit: UW/NSF-OOI/WHOI. V20.

Millions of limpets surround palm worms thriving on the actively venting structure "Mushroom". Credit: UW/NSF-OOI/WHOI: V20.

Beauitful lavender-blue protists thrive at the base of the active chimney 'Mushroom'. Credit: UW/NSF-OOI/WHOI. V20.

The base of the actively venting structure 'Mushroom' is covered with tubeworms, blue ciliates, limpets and filamentous bacteria. Credit: UNW/NSF-OOI/WHOI. V20.

A HPIES instrument is about to be released to free fall to the seafloor 2600 m below at the base of Axial Seamount. Credit: University of Washington.