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

In a river of southern China, a “slender” creature with “tiny scales” under its skin paused to rest along the gravel riverbed. Its coloring helped it blend in, but not well enough. Nearby scientists ...

A rarely seen oarfish struggling in shallow waters was spotted off Mexico's coast, sparking curiosity and concern. The ...