Oarfish are rarely documented by scientists, but one was seen this month by a group visiting a beach in Mexico.

On Feb. 9, beachgoers captured a video of a rare “doomsday” oarfish on the shores of Baja California Sur, Mexico. According to USA Today, this shimmering serpent is a sign of impending doom in Japanese folklore. The video shows the ribbon-looking fish swimming through the clear waters up to the shore, where witnesses surround it.

Beachgoers in Mexico were surprised to see a rare oarfish in shallow waters, in Japanese folklore an oarfish sighting is a symbol of impending doom.