Abyssline Institute Monterey · Deep-Sea Research

Hadal Zone Research · Est. 2011

We go where light gives up.

Abyssline Institute is a nonprofit ocean-science group in Monterey, California. We build the instruments, run the expeditions, and publish the data that map the deepest, least-visited habitat on Earth.

Fund an expedition Meet Lampyra
Twilight Zone · 200 to 1000 m

The Vehicle: ROV Lampyra

Named for the firefly genus, Lampyra is our purpose-built remotely operated vehicle. She carries the lights, cameras, and sampling arms that let a shore-side team work the seafloor eleven kilometers down without ever getting wet.

SYNTACTIC FOAM 7-FN MANIPULATOR 2.4 m
Fig. 1 · Lampyra, dorsal schematic. Titanium and syntactic-foam frame, four vectored thrusters, seven-function manipulator, 4K low-light dome camera.
  • ClassWork-class ROV
  • Depth rating11,000 m
  • Thrusters4 vectored, 2 vertical
  • Sampling arms2 (7-function + 5-function)
  • Payload140 kg samples
  • Lighting32,000 lm LED array
  • Tether13 km fiber-optic
  • SensorsCTD, eDNA, hydrophone

Lampyra dives from the R/V Petrel Song, our 34-meter research vessel berthed at Monterey Harbor. A full seafloor cycle to hadal depth and back takes roughly nine hours, most of it spent in free descent through water colder than a refrigerator and darker than any cave.

Midnight Zone · 1000 to 4000 m

Discoveries

Every descent returns with something the catalog has not seen. Three findings from recent Lampyra dives, still under review, are described below with provisional binomial names assigned by our taxonomy team.

Recovered 2,140 m

Lantern gulper

Saccopharynx pinnata

A ribbon-bodied predator with an expandable jaw and a tail tip that ends in a pale luminous knot. Stomach contents suggest it ambushes migrating shrimp in near-total darkness.

Recovered 3,410 m

Comb drifter

Ctenophora abyssalis

A translucent ctenophore whose eight comb rows scatter our lights into rolling rainbows. It holds position against current with almost no visible effort, a trait we are still trying to model.

Recovered 3,880 m

Velvet armfoot

Cirroteuthis monterensis

A finned cirrate octopus that hovers just above the mud, feeling for prey with webbed arms. The Monterey population appears distinct from Pacific relatives, which is why we gave it a local name.

In the midnight zone, the only reliable light is the light an animal makes for itself. Lampyra runs dark on approach, then wakes her lamps for a few seconds at a time so we photograph these fish behaving, not fleeing.

Abyssal Zone · 4000 to 6000 m

The Hadal Program

Below six kilometers the ocean enters the hadal zone, named for Hades. Our multi-year Hadal Program targets the trench systems of the western Pacific. These are lightly edited excerpts from the shipboard log, kept by whoever is on the con.

Dive 214 · 03 March 2026
Depth 6,207 m · Bottom temp 1.4 C

Touchdown on soft rust-colored ooze. Within four minutes an amphipod swarm found the bait plate. We counted more than three hundred individuals in a single frame. Nothing about this place is empty. It is only quiet.

Dive 219 · 11 April 2026
Depth 7,845 m · Current 0.06 kn

Recovered a sediment core and a length of frayed longline that does not belong here. Plastic fibers at nearly eight kilometers down. We logged it, photographed it, and bagged a subsample for the microplastics team in Monterey.

Dive 226 · 02 June 2026
Depth 9,930 m · Manipulator nominal

A snailfish held station beside the dome for almost a minute, translucent and unbothered by the lights. This is very likely the deepest fish anyone on this crew has watched swim. Nobody spoke on the con until it drifted off.

Dive 231 · 20 June 2026
Depth 10,902 m · Approaching floor

Full descent. The tether counter reads what we came for. Pressure out here is more than a thousand times the surface. Lampyra took the last thirty meters slow, and the mud rose to meet her like it had been waiting.

Hadal Zone · 6000 m and below

Support the Descent

Abyssline is a 501(c)(3) nonprofit. Ship time, tether, and sensors are expensive, and the trench is not going to fund itself. Membership tiers are named for the zones you help us reach. Every gift is tax-deductible.

Sunlight
Surface to 200 m
$40/year
  • Quarterly dive dispatch
  • Species-of-the-month notes
  • Name in the annual log
Join
Popular
Midnight
1000 to 4000 m
$150/year
  • Everything in Sunlight
  • Live dive-day stream access
  • Raw seafloor image sets
  • Field guide, printed and shipped
Become a member
Hadal
6000 m and below
$600/year
  • Everything in Midnight
  • Named on the vehicle frame
  • Annual briefing with the science lead
  • Invitation to a harbor dive day
Sponsor a trench

Prefer to give once? A one-time gift of any size goes straight to ship fuel and sensor repair. Contact our team at support@abyssline.org.