Gaming seals reveal how cloudy water provides sense of direction
Open water swimming can be strangely claustrophobic. Immerse your face in cloudy water and your view might dwindle to a few centimetres. Yet, harbour seals (Phoca vitulina) manage to negotiate the turbid coastal waters in which they reside with ease, detecting their surroundings through various senses, including their dextrous whiskers. But Frederike Hanke from University of Rostock, Germany, wondered whether the resourceful creatures may also to use their vision to determine which direction they are manoeuvring in, despite the opaque view. ‘We wanted to know whether harbour seals can determine their heading from ...