FRANKFURT (Reuters) - Banks that do not adapt to the new reality of low interest rates, competition from fintech companies and tighter regulation will fail, one of the European Central Bank's top supervisors said on Wednesday.

"The banks that adapt will thrive, those that don’t will fail," Danièle Nouy, chair of the ECB's supervisory board, said on Wednesday.

(Reporting By Francesco Canepa; editing by Ralph Boulton)