Alga is oogamous. This brown algal organism consists of a filamentous thallus. Its lifecycle is perhaps more typical of the brown algae. The thalli in the wild are isomorphic. The gametophytes are heterothallic and isomorphic.
Sporophytes produce unilocular sporangia with a sporocyte.
Sporocytes divide meiotically, then mitotically and release haploid zoospores. Zoospores settle, grow into haploid heterothallic isomorphic gametophytes. Gametophytes produce plurilocular gametangia. Gametangia of both mating types release isomorphic gametes. Alga is isogamous.