David Shale / Fang Tooth {Anoplogaster cornuta} close-up of head showing teeth, from the Mid-Atlantic Ridge, 2600m

Solvin Zankl / Common fangtooth (Anoplogaster cornuta) deep sea species from Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Common fangtooth (Anoplogaster cornuta) portrait, deep sea species from Atlantic Ocean off Cape Verde. Captive.

Thomas Marent / Mandrill (Mandrillus sphinx) male in defensive posture, Lekedi Natural Preserve, Gabon

Cyril Ruoso / Drill (Mandrillus leucophaeus) alpha male calling, Pandrillus Drill Sanctuary, Cross River State, Nigeria

David Shale / Fangtooth (Anoplogaster cornuta) portrait, Mid-Atlantic Ridge, North Atlantic Ocean

Mark Bowler,Mark Bowler / Siberian musk deer (Moschus moschiferus) male with tusks grooming, captive, Midlothian deer enclosure, UK, vulnerable species

David Shale / Fang Tooth {Anoplogaster cornuta} close-up of head showing teeth, from the Mid-Atlantic Ridge, 2600m

Michael & Patricia Fogden / Vampire Bat (Desmodus rotundus) portrait, Costa Rica

Norbert Wu / Fangtooth (Anoplogaster cornuta) has bony, hard body, unlike most deep sea fish, San Diego, California

Norbert Wu / Fangtooth (Anoplogaster cornuta) has bony, hard body, unlike most deep sea fish, Eastern Pacific

LYNN M. STONE / Fangs of Eastern diamondback rattlesnake. Florida, USA {Crotalus adamanteus}