Oct 28, 2025
Uncharismatic Fact of the Day
The vampire fish might not actually drink blood, but it certainly looks the part! Also known as the payara, they are known for their extremely long lower teeth-- in fully grown adults, they can reach up to 15 cm (6 in). Because of their length, payara skulls have hollow sockets to sheath their lower teeth when their mouths are closed.
(Image: Researcher Zeb Hogan holding a payara (Hydrolycus scomberoides) by National Geographic)