Pycnogonids (sea spiders) were very abundant in this area of Dymond Vent Field on the SE flank of Axial Seamount. Credit: UW/NSF/OOI/WHOI, J2-1669, V24.

A cave full of pycnogonids (aka sea spiders) at Dymond Vent Field on the SE flank of Axial Seamount. Credit: UW/NSF/OOI/WHOI, J2-1669, V24.

An eelpout (possibly Pachycara sp.) confronting the ROV from within a crevice at the Dymond Vent Field on the SE flank of Axial Seamount. Credit: UW/NSF/OOI/WHOI, J2-1669, V24.

An eelpout (possibly Pachycara sp.) poking its head out of a crevice at the Dymond Vent Field on the SE flank of Axial Seamount. Credit: UW/NSF/OOI/WHOI, J2-1669, V24.

A Dungeness crab being photobombed by a Dover sole at the Oregon Shelf (80 m) site. Credit: UW/NSF/OOI/WHOI, J2-1743, V25.

A Dungeness crab walking under the Oregon Shelf (80 m) node cable, which is covered in barnacles and sea anemones. Credit: UW/NSF/OOI/WHOI, J2-1743, V25.

Two Dungeness crabs in a mating posture during a dive at the Oregon Shelf (80 m) site. Credit: UW/NSF/OOI/WHOI, J2-1742, V25.

Two Dungeness crabs observed mating during a dive at the Oregon Shelf (80 m) site. Credit: UW/NSF/OOI/WHOI, J2-1742, V25.

Pacific flatnose (Antimora microlepis) seen poking around near ASHES vent field. UW/NSF/OOI/WHOI; J2-1729, V25

Sea cucumber crawling across the lava flow at Axial Seamount. Credit: UW/NSF/OOI/WHOI; J2-1729, V25

Large rattail fish at Axial seamount. Credit: UW/NSF/OOI/WHOI; J2-1729, V25

Graneledone Octopus (Graneledone boreopacifica) checking out Jason from its basalt perch. Credit: UW/NSF/OOI/WHOI; J2-1729, V25.

Graneledone Octopus (Graneledone boreopacifica) checking out Jason from its basalt perch. Credit: UW/NSF/OOI/WHOI; J2-1729, V25.

A group of Short-nosed Common dolphins hung out with us for a while last night at sunset. Credit: J. Tilley, UW-APL, V25.

Intertwined hagfish dine on fish carcass at Southern Hydrate Ridge. Credit: UW/NSF-OOI/WHOI, J2-1719, V25.

A small, pink anemone growing on the basalt at Axial Seamount, next to a few chemosynthetic tube worms. Credit: UW/NSF-OOI/WHOI, J2-1707, V25.

A spider crab picking its way over an old lava flow on the seafloor at Axial Seamount. Credit: UW/NSF-OOI/WHOI, J2-1707, V25.

An assortment of different polychaete worms and limpets on Mushroom hydrothermal vent. Credit: UW/NSF-OOI/WHOI, J2-1707, V25.

Scale worms, palm worms, and limpets on Mushroom vent. Credit: UW/NSF-OOI/WHOI, J2-1707, V25.

Tube worms, palm worms, and limpets on Mushroom vent. Credit: UW/NSF-OOI/WHOI, J2-1707, V25.

A rattail (grenadier) fish swimming towards the Mushroom vent, with the CAMHD below. Credit: UW/NSF-OOI/WHOI, J2-1707, V25.

Tiny snails climbing on the tracer tubing of the Mosquito fluid sampler at SHR. Credit: UW/NSF-OOI/WHOI, J2-1719, V25.

A small rockfish facing the camera at Southern Hydrate Ridge. Credit: UW/NSF-OOI/WHOI, J2-1715, V25.

A hermit crab wearing a snail shell crawls across the seafloor at Southern Hydrate Ridge. Credit: UW/NSF-OOI/WHOI, J2-1715, V25.

A roughtail skate sits next to some rockfish and a Tanner crab at SHR. Credit: UW/NSF-OOI/WHOI, J2-1715, V25.

A roughtail skate sits next to some rockfish at SHR. Credit: UW/NSF-OOI/WHOI, J2-1715, V25.

A group of scavenging hagfish tearing apart a dead sablefish at Southern Hydrate Ridge. Credit: UW/NSF-OOI/WHOI, J2-1715, V25.