Keiko was a captive orca who was transported back to the North Atlantic and released to the open sea, where he swam freely but never fully returned to a wild life without humans.

A king penguin named Lala strolls through a quiet Japanese street with his little backpack, faithfully completing his daily errand to the fish market.

A tough little tidepool fish became one of NASA’s earliest space adaptors, learning to swim in zero gravity while its fry evolved even faster.

Moko cut through the cold Mahia surf, nudging the stranded whales into the narrow channel as the beach fell silent to watch him lead them home.

In the summer fog of 1958, a wild sea lion named Etta dove into a riptide twice to push two drowning children back toward safety.