Scientists discovered that fungi living inside mangrove plant tissues can produce tannase, an enzyme that breaks down tannins into a useful compound called gallic acid. Two fungal species, Phyllosticta capitalensis and Aspergillus chevalieri, were found to be particularly good at producing this enzyme. This discovery is significant because tannase has many industrial applications in making medicines, processing food, and cleaning up the environment. The researchers also figured out the best conditions (temperature, pH level, and time) for these fungi to produce the most enzyme.