Need help.

Can't find anything on this one, but it's probably fungus, as the only other thing I can think of is a discarded orange slice. Brandon B.
Taxonomy:
Kingdom: Fungi
Phylum: Dikarya
Class: Pezizomycotina
Order: Pleosporomycetidae
Family: Pleosporineae
Genus: mitosporic Pleosporaceae
Species: Alternaria
it is the spots on the orange
Brandon S.