Stuff To Blow Your Mind From the Vault: Hunters of the Dark Ocean, Part 3
Mar 21, 2026
A tour of weird deep-sea predators and newly discovered abyssal hunters. They spotlight snailfish thriving near the seafloor and record-breaking deepest fish sightings. The conversation covers bizarre anglerfish biology, bioluminescent lures, and parasitic mating strategies. Chemical limits of life at extreme depths and how deep animals cope with pressure and smell are also explored.
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Dolphin Carcass Drops Reveal Snailfish Predation
- Dasgupta et al. staged dolphin carcass drops into hadal trenches to observe scavenger dynamics.
- They recorded amphipod scavengers arriving first and snailfish acting as secondary predators that ate those amphipods.
Snailfish Hold The Deepest Confirmed Fish Record
- Snailfishes (family Liparidae) dominate hadal trenches and include the deepest confirmed fish at 8,336 meters.
- The record was a juvenile Pseudoliparis observed on a baited camera in the Izu-Ogasawara Trench during a 2022 expedition.
Osmolyte Limits Likely Cap How Deep Fish Can Live
- Fish depth is biochemically limited by osmolyte (TMAO) concentration needed to stabilize proteins under pressure.
- Models predict a theoretical fish depth limit near ~8,400 meters, explaining why finds won't be much deeper than 8,336 meters.
