Zissou Flag from the movie Life Aquatic with Steve Zissou 2004

The Zissou flag is square shaped.  It is primarily composed of the colours white, blue, yellow, red, and light green.  In the movie it gets altered by Steve Zissou's long lost son who adds four symbols to the corners.

In the upper hoist side is a red letter E with a life preserver.  The E stands for Esteban du Plantier who was Steve's best friend who is attacked by the Jaguar Shark.  Esteban is played by Seymour Cassel.  In the upper fly side is a red letter K with a dolphin.  The K stands for Klas Daimler, the German second in command, who looks deeply up to Steve Zissou played by William Dafoe.  In the lower fly side is a red letter B with an anchor.   And finally in the lower hoist side is the letter N with a octopus.  The N stands for Ned, Steve's long lost son played by Owen Wilson.
  
SPOILER ALERT: DO NOT CLICK VIDEO IF YOU INTEND TO WATCH THE MOVIE