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)