From a research vessel on the surface, scientists piloted a remote-controlled submarine around a volcanic crater off the coast of Japan. Something disrupted the blue expanse and caught their attention ...

This Indo-Pacific stunner dons a kaleidoscope shell of greens, blues, reds, and oranges, with purple eyes that swivel independently. At 3-18 cm long, it packs a punch like a .22 bullet using club-like ...

The ocean covers more than 70% of our planet’s surface, yet we’ve explored less than 5% of it. Below the sunlit waves lies an alien world of crushing pressure, eternal darkness, and bone-chilling cold ...

This alien-looking sea creature survives by stealing venom, toxins, and even live stinging cells from dangerous prey before storing the stolen weapons inside its own body, allowing it to survive ...