Figure 1
From: Upside-down swimming behaviour of free-ranging narwhals
Narwhal instrumented with satellite, a Crittercam and DTAG tags. A male narwhal (#37232) tagged with a satellite tag (enclosed by the circle), a Crittercam (enclosed by the ellipse) and a DTAG (enclosed by the rectangle) at Kakiak Point in Admiralty Inlet, Canada on 11 August 2004. Photograph courtesy of Rune Dietz.