Pelagophyceae is a class of heterokont algae.

They can be single-celled (coccoid or flagellate), palmelloid or filamentous.

Some members (Pelagomonas) belong to picoplankton, and some other (Sarcinochrysis) are macroscopic attached organisms.

[3] The class contains 13 genera, three families and two orders (2017):[4][5] It is expected that molecular studies will add more species to this list.

[3] This heterokont-related article is a stub.