Narwhals lack a dorsal fin, and in adults the flippers are turned upward at the tips. Their mottled gray bodies are.... ( style:

Adult males weigh about 1,600 kg (3,500 pounds); females weigh about 1,000 kg. The narwhal has two teeth, both at the tip of the upper jaw, but usually only the left tooth develops. The undeveloped right tooth in males and usually both teeth in females remain vestigial. MLA style: "narwhal ( Monodon monoceros ) ." APA style: narwhal ( Monodon monoceros ) . style: "narwhal ( Monodon monoceros ) ." ( style: