The R/V Thompson in Newport, Oregon being mobilized to begin the NSF-OOI Regional Cabled Array 2023 Expedition. Credit: M. Elend, University of Washington, V23

A Blue Heron patiently waits in Yaquinna Bay for "breakfast". Credit: D. Kelley, University of Washington, V23

Larvaceans filter feed using these mucus houses, which are frequently seen in the water column during ROV dives. Credit: UW/NSF-OOI/CSSF, Dive R1755, V14

A discarded larvacean mucus house, seen in the water column above Southern Hydrate Ridge. Credit: UW/NSF-OOI/CSSF, Dive R1754, V14

All Leg 1 OOI Infrastructure for VISIONS'23 loaded on the back deck of the Thompson. Credit: Grant Dunn, UW-APL

A rockfish and sea star rest among a bed of clams at Southern Hydrate Ridge. Credit: UW/NSF-OOI/CSSF; V15.

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Two rockfish hang out be heavily sediment carbonate rocks at Southern Hydrate Ridge. Credit: UW/NSF-OOI/WHOI; V20.

Life thrives at Southern Hydrate Ridge, now an "Essential Fish Habitat". Here a purple hagfish, rockfish and 10's of brittle stars rest on the sedimented seafloor. Credit: UW/NSF-OOI/WHOI; V19.

A beautiful rockfish rests on sediment at Southern Hydrate Ridge in 2014. Credit: UW/NSF-OOI/CSSF; ROPOS, V14.

A small rockfish hangs out at Einstein's Grotto. Credit: UW/NSF-OOI/CSSF; ROPOS Dive R1754; V14.

A rockfish hides in a blow-out cavern underneath hydrate at Einstein's Grotto, Southern Hydrate Ridge. Credit: UW/NSF-OOI/CSSF; ROPOS, V14.

An osmotic fluid sampler is installed in a diffuse flow site in the ASHES hydrothermal field at the summit of Axial Seamount. It samples fluids for 1-year, providing time-series geochemistry. A round "lid" allows sampling of fluids less mixed with seawater. Credit: UW/NSF-OOI/CSSF; ROPOS dive R2240; V22.

A blue shark swims past a school of fish near the surface at Southern Hydrate Ridge. Credit: NSF-OOI/UW/CSSF, Dive R2260, V22

Unidentified squid seen during the ROV ascent from the seafloor at Southern Hydrate Ridge. Photo credit: NSF-OOI/UW/CSSF, Dive R2260, V22

Looking down on a galatheid crab sitting on the rope attached to a marker next to the anchor of the Slope Base profiler mooring in 2900 meters (~9500 feet) of water. A number of venus flytrap anemones are also attached to the hard surfaces here. Photo credit: NSF-OOI/UW/CSSF, Dive R2258, V22

A galatheid crab (aka squat lobster) sitting on the rope attached to a marker next to the anchor of the Slope Base profiler mooring in 2900 meters (~9500 feet) of water. A number of venus flytrap anemones are also attached to the hard surfaces here. Photo credit: NSF-OOI/UW/CSSF, Dive R2258, V22

A unique community of invertebrates gathered around the anchor of the Slope Base profiler mooring in 2900 meters (~9500 feet) of water, including a Bathydoris nudibranch, flytrap anemones, galatheid crabs, and sea cucumbers. Photo credit: NSF-OOI/UW/CSSF, Dive R2258, V22

A unique community of invertebrates gathered around the anchor of the Slope Base profiler mooring in 2900 meters (~9500 feet) of water, including a Bathydoris nudibranch, flytrap anemones, galatheid crabs, and sea cucumbers. Photo credit: NSF-OOI/UW/CSSF, Dive R2258, V22

A unique community of invertebrates gathered around the anchor of the Slope Base profiler mooring in 2900 meters (~9500 feet) of water, including a Bathydoris nudibranch, flytrap anemones, galatheid crabs, and sea cucumbers. Photo credit: NSF-OOI/UW/CSSF, Dive R2258, V22

A startled squid (likely Octopoteuthis deletron) releasing ink during the descent towards the Slope Base Shallow Profiler anchor. Photo credit: NSF-OOI/UW/CSSF, Dive R2258, V22

A deep-sea octopus (possibly Muusoctopus?) seen at Slope Base during the Shallow Profiler EOM anchor inspection. Two anemones are attached to the nearby cable. Credit: NSF-OOI/UW/CSSF, Dive R2256, V22

A deep-sea octopus (possibly Muusoctopus?) seen at Slope Base during the Shallow Profiler EOM anchor inspection. Photo credit: NSF-OOI/UW/CSSF, Dive R2256, V22

An echinothuriid sea urchin at Slope Base during the 2022 recovery of the MJ01A junction box. Credit: UW/NSF-OOI/CSSF, ROPOS Dive R2250, V22.

The bottom pressure and tilt unit (BOTPT) measures the inflation and deflation of the seafloor at the summit of Axial Seamount using a precision pressure sensor and tilt meter that enable detection of the seafloor’s rise, fall, and deformation as molten rock moves in and out of the underlying magma chamber. Credit: NSF-OOI/UW/CSSF, Dive R2249, V22

A deep-sea purple octopus (Graneledone boreopacifica) seen during a survey on the Eastern flank of Axial Caldera. Credit: NSF-OOI/UW/CSSF, Dive R2243, V22

A rubbly, jumbled sheet flow in the ASHES hydrothermal field at ~ 1500 m water depth, summit of Axial Seamount Credit: UW/NSF-OOI/CSSF; ROPOS Dive R2240, V22.