Direct answer
The deepest fish recorded on video is a snailfish filmed at 8,336 meters in the Izu-Ogasawara Trench. Snailfish collected at 8,022 meters are the deepest fish captured.
The record is a video observation
In August 2022, a baited lander filmed a snailfish at 8,336 meters in the Izu-Ogasawara Trench. The peer-reviewed report was published in 2023.
Because the animal was not captured, researchers identified it as a probable Pseudoliparis species rather than assigning a perfectly certain species name.
The deepest captured fish came from 8,022 meters
In the neighboring Japan Trench, researchers collected two Pseudoliparis belyaevi at 8,022 meters. That is the deepest confirmed capture, while 8,336 meters remains the video record.
Observed and captured are separate record categories and should not be blended.
Snailfish bodies suit trench conditions
Hadal snailfish are soft-bodied, scaleless, and lack gas-filled swim bladders. Their cellular chemistry includes adaptations that help proteins and membranes function under pressure.
They feed in trench ecosystems where amphipods and other small animals can be locally abundant.
Fish appear to have a depth ceiling
Pressure constrains protein stability and the chemistry organisms use to counteract it. Researchers expect a physiological lower limit for fishes above the deepest trench floors.
The 8,336-meter record is therefore close to a predicted boundary, but future observations can still refine the exact limit.
At a glance
| Feature | What the evidence shows | Example or boundary |
|---|---|---|
| Deepest filmed | 8,336 m | Probable Pseudoliparis |
| Deepest captured | 8,022 m | P. belyaevi |
| Habitat | Ocean trenches | Hadal zone |
| Body | Soft, scaleless, no swim bladder | Pressure adaptation |
Frequently asked questions
Was the 8,336-meter fish captured?
No. It was recorded on video; specimens were captured at 8,022 meters.
Why are snailfish so deep?
Their soft bodies, lack of gas spaces, pressure-adapted chemistry, and trench food webs support hadal life.
Could fish live at Challenger Deep?
Current physiology and observations suggest fishes reach a limit well above the deepest 10,935-meter floor.
Is the species identification certain?
The filmed individual was not collected, so the study treated the species-level identification as probable rather than absolute.
Evidence
Sources reviewed
- New maximum depth record for bony fish at 8,336 metersUniversity of Western Australia Research Repository · checked 2026-07-30
- What is the deepest-living fish?NOAA Ocean Exploration · checked 2026-07-30
- How does pressure impact animals in the ocean?NOAA Ocean Exploration · checked 2026-07-30
- Hadal zoneWoods Hole Oceanographic Institution · checked 2026-07-30