The 20-year-old Argentinian, who moved to Anfield from Real Madrid in the summer of 2007, was a regular for the second string but never made a first-team appearance.
'Liverpool have completed the permanent transfer of Gerardo Bruna to Championship side Blackpool,' said a statement on the Premier League club's website.
Trading places: Charlie Adam recently moved in the opposite direction
Bruna has signed a two-year deal with the option of a further 12 months, Blackpool have confirmed.
The Argentinian trained with his new team-mates on Monday.
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