Atlantic walrus and scuba diver during a typical feeding session. Young Sound, Northeast Greenland 2001. (Photo by Göran Ehlmé and Søren Rysgaard). I: Scuba diver closing in on ventilating walrus. II: Walrus and scuba diver beginning a foraging dive. III: Walrus and scuba diver at the bottom during feeding.
Levermann et al. BMC Ecology 2003 3:9 doi:10.1186/1472-6785-3-9