Researchers put six grey seals in a specially built tank to work out why they don't drown – and discovered something unexpected
## Seals Reveal Surprising Breathing Trick During Research
Scientists have uncovered a fascinating secret about how grey seals manage to stay underwater for so long. Researchers at the University of St Andrews, Scotland, recently studied six seals in a custom-built tank to understand their diving abilities. The goal? To pinpoint exactly how these marine mammals avoid drowning.
The team observed something unexpected: the seals periodically open their mouths slightly while submerged. This allows water to flow over their spiracles, small nostrils located on top of their heads. Spiracles are unique to seals and are used for breathing while resting at the surface.
Previously, scientists believed seals closed their spiracles completely during dives. This new discovery suggests a more flexible breathing strategy, potentially aiding oxygen intake at depth. The findings, published in Biology Letters, offer valuable insights into marine mammal physiology and adaptation.
This research could inform conservation efforts and deepen our understanding of these incredible creatures.