Biology
The Physiological Adaptations of Deep-Sea Fishes to Extreme Pressure
Quick fact
Deep-sea fish accumulate high concentrations of trimethylamine N-oxide (TMAO), a molecule that prevents their proteins from being crushed by pressure—the deeper they live, the more TMAO they produce.
Why this is interesting
We can barely dive 30 meters without pain, yet some fish thrive at depths where the pressure would crush a submarine. How do they survive?