Metabolite profiling and pathway prediction of laver (Porphyra dentata) kombucha during fermentation at different temperatures

•Metabolites of laver kombucha at different fermentation conditions was studied.•Accumulation of phenolic compounds and organic acids was found after fermentation.•Most of amino acids degraded at the end of fermentation for both conditions.•Higher metabolite accumulation was observed at lower temperature.•Pathway prediction was explored for laver kombucha fermentation for the first time.