Thalassa (disambiguation)

Thalassa is a personification of the sea in Greek mythology.

Thalassa may also refer to:

• Thalassa (band), a band which represented Greece at the Eurovision Song Contest 1998
• Thalassa (beetle), a genus of ladybug
• Thalassa (moon), a moon of the planet Neptune
• Thalassa (TV series), a French documentary programme
• French ship Thalassa (1995), a ship of the Ifremer
• A fictional planet in Arthur C. Clarke's novel The Songs of Distant Earth
• A character from the Star Trek original series episode "Return to Tomorrow"
• Thalassa Gramarye, a fictional musician in the video game Apollo Justice: Ace Attorney