Three new terphenyl-type metabolites, arenarins A-C (1-3), have been isolated from the sclerotia of Aspergillus arenarius (NRRL 5012). The structures of these compounds were elucidated by analysis of 1-D and 2-D NMR data. Arenarins A-C exhibited mild activity in feeding assays against the dried-fruit beetle Carpophilus hemipterus and cytotoxicity against human tumor cell lines.