entity_id,source_id,evidence_type,source_note
ENT_THALASSA,SRC_HESIOD_THEOGONY,direct attestation,"Theogony 233: Thalassa (the sea-surface) is named as the mother of Phorcys and Ceto in the Theogony's genealogical system: ""Pontus begat old Nereus... after that Thaumas and proud Phorcys, born of the same mother, Ceto with the fair cheeks and Eurybia"" — Thalassa provides the maternal sea-element alongside Pontus's paternal sea-element; primary source for Thalassa as a named entity"
ENT_THALASSA,SRC_HOMER_ILIAD_ODYSSEY,direct attestation,"Thalassa (the Sea) is personified in Homer as the cosmic salt sea; Iliad I.316, etc.; she is not a major narrative character but represents the sea as a divine entity"
ENT_THALASSA,SRC_THEOI_GODS,index attestation,Literary attestation in classical/mythographic tradition; cult evidence varies by entity.
ENT_THALASSA,SRC_THEOI_HOME,index attestation,"Attested in Theoi Project index (Greek gods, spirits, heroes in classical literature)."