Novel natural products of marine fungi have increased dramatically in recent years.
The term ‘marine-derived fungi’ is used in most reports in natural chemistry discipline.
‘Marine’ status of the fungi is questionable in some reports, especially mangrove endophytes.
Metagenomics and genome sequencing, etc. can be used to identify fungi of a marine origin.
A broad definition of marine fungi based on physiology, ecology and molecular biology is proposed.