What characteristic allows grey seals to detect prey in low-light or dark, murky water?

Answer

Highly sensitive vibrissae detecting water turbulence

Grey seals possess highly sensitive whiskers (vibrissae) adept at detecting subtle changes in water pressure and the turbulence or wake created by nearby prey, effectively allowing them to 'see' movement through water.

What characteristic allows grey seals to detect prey in low-light or dark, murky water?
animalmammalmarineadaptationseal