Thalassa (disambiguation)

Thalassa is a primordial Greek sea goddess. Thalassa may also refer to:


 * Thalassa (moon), a moon of the planet Neptune
 * Thalassa, a fictional planet (a waterworld) in Arthur C. Clarke's novel The Songs of Distant Earth
 * Thalassa (genus), a genus of ladybug
 * Thalassa (poem), the title of a late poem written by Louis MacNeice
 * Thalassa (band), a band which represented Greece at the Eurovision Song Contest 1998
 * Thalassa (TV series), a French documentary programme
 * Thalassa (book), a book by psychoanalyst Sándor Ferenczi
 * RV FRENCH SHIP Thalassa, a ship of the Ifremer.
 * Thalassa (tall ship), a barquentine sailing ship from the Netherlands
 * Thalassa sea & spa, a chain of thalassotherapy spas owned by French hotel group Accor
 * Thalassa (fictional character), one of three remaining incorporeal members of a society of alien beings from the Star Trek original series episode "Return to Tomorrow"
 * Thalassa Gramarye, a fictional musician in the Ace Attorney video game series, appearing in Apollo Justice: Ace Attorney