Scientists find sensory hair cells across entire squid bodies
The discovery of widespread hair cells on squids could provide a new model for studying human hearing loss.
Researchers at Case Western Reserve University have discovered that sensory hair cells are spread across the entire surface of a squid's body, according to a Times of India report.
The study, titled ‘An anatomical map of squid lateral lines’, was published in the journal Current Biology in September 2026. Previously, scientists believed these microscopic structures were located only on the heads and arms of squids.
These hair cells allow the marine animals to detect movements in the surrounding water, such as shifting currents or passing animals. The research team used light sheet microscopy to create detailed 3D images of the squid's lateral lines.
Unlike the hair bundles found in fish, the hair bundles in squids appear to vary in length. Researchers suggest this difference might allow the cells to react to various frequencies of water movement, similar to the human ear.
The findings may offer a new way to study how human hearing cells fail. While human hair cells are located deep inside the cochlea, the squid's hair cells are on the outside of its body, making them easier to observe.
Because damaged human inner-ear hair cells generally do not regenerate naturally, scientists are looking for ways to understand how they function and become damaged. The accessibility of squid sensory structures could help researchers investigate how hair bundles are constructed and how they respond to stimulation.