30 species Blastocladia is a genus of aquatic fungi.

Blastocladia species have a thallus that consists of a single, branched basal cell or trunk with rhizoids at one end and sporangia at the other.

[1] Members of Blastocladia grow on submerged twigs and fruit.

[3] Joseph Schröter (1897) included it with the water mold family Leptomitaceae.

[4] As of December 2015[update], Index Fungorum accepts 30 species in Blastocladia:[5]