Cyanea may be:
- Cyanea (jellyfish), a genus of jellyfish in the family Cyaneidae
- Cyanea (plant), a genus of Hawaiian plants in the family Campanulaceae
- An ancient Greek name that means "blue sky" and in the Greek alphabet it's written "Κυάνεια"
- Latin binomial abbreviations for species
- N. cyanea
- T. cyanea