It runs from the Pacific Ocean to the Gulf of Mexico and while most of that border,more than 1,200 miles of it,runs along the U.S. state of Texas, the barriers that are currently there cover 100 miles.
When it's dark or the water is murky, however, squid rely on a secondary sensory system, made from thousands of tiny hair cells that are only about twelve microns long and run along their heads and arms.