What is "eisenia"

Eisenia may refer to:

• Eisenia (alga), a brown alga genus
• Eisenia (annelid), an earthworm genus

Eisenia is a genus of earthworm.

Eisenia is a brown alga genus in the family Lessoniaceae. The genus is names for California Academy of Sciences curator, Gustav Eisen.

Eisenia bicyclis is a species of kelp best known for its use in Japanese cuisine.