During a migration study, a researcher discovered a silky shark in Florida regenerating its dorsal fin, highlighting the species’ extraordinary healing powers. I made an accidental and astonishing discovery while studying the movements of sharks off the coast of Jupiter, Florida. I set out to record the migration routes of silky sharks, named for their smooth skin. Instead, in a story filled with twists and turns, I ended up documenting the rare phenomenon of a shark regenerating a dorsal fin.