Promachoteuthis sulcus is a deep-sea squid known from a single specimen, collected in 2007 at 2000 meters (6,600 feet). Despite this, its photograph has spread far and wide because it looks like it has a pair of human teeth! The scientists describe these “teeth” as “dentures,” but they are actually lips that surround its sharp beak (not seen in photo).
Photograph by Richard Young.
(via: Promachoteuthis sulcus)