Family MONODONTIDAE
(NARWHAL AND BELUGA)
• Medium-sized toothed whales, with blunt heads, fusiform bodies narrowing toward tails, short beaks, mouths curving upward toward eyes, and no dorsal fins; rostrums have globe-like melons containing fatty tissue used in echolocation.
• 300-500 cm.
Arctic and subarctic regions.
Circumpolar, mainly Arctic andsubarctic seas.
2 genera, 2 species, 2 taxa.
No species threatened; none Extinct since 1600.