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Article by Lauren Farrar
Scientists at the California Academy of Sciences have recently engineered a device that allows them to collect newly-discovered fish species from the ocean’s “twilight zone” and safely bring them up to the surface to study. Prior to this invention, it was difficult for scientists to study fish in this region because many fish can’t handle the rapid change in pressure they experience when being transported to the surface.
In water, pressure increases with depth. When you are submerged in a body of water, like the ocean, you experience pressure from the force of the water surrounding you. At the surface, the pressure from the water is the same as the pressure from the air. However, as you descend, pressure increases because there is more water above you. The weight from all that water creates a greater force pushing against you, therefore you experience greater pressure.
Why does this pressure matter for fish?