Southampton - Grimsby -

A central symbol of the match was the thousands of inflatable fish, known as "Harry Haddocks," brought by the traveling Grimsby supporters.

The encounter between Southampton and Grimsby Town on March 1, 2023, remains one of the most storied "giant-killings" in modern FA Cup history. This fifth-round tie saw League Two underdogs Grimsby travel to St Mary’s Stadium and secure a stunning 2-1 victory over their Premier League hosts. The match is defined by several unique narrative layers: The "Harry Haddock" Invasion Southampton - Grimsby

: More than 4,000 Grimsby fans filled the away end, creating a "sea of inflatable fish" that became the iconic image of the upset. A central symbol of the match was the

: Southampton initially intended to ban the inflatables due to stadium policy, but relented after a backlash from fans who argued the club should have "bigger fish to fry". The match is defined by several unique narrative