CREATE TABLE table_21797 ("Scientific name" TEXT, "Common name" TEXT, "Length  ( male ) " TEXT, "Length  ( female ) " TEXT, "Color" TEXT, "Lifespan  ( years ) " TEXT)

Name the common name for rhampholeon spectrum
SELECT "Common name" FROM table_21797 WHERE "Scientific name" = 'Rhampholeon spectrum'
SELECT "Common name" FROM "table_21797" WHERE "Scientific name" = 'Rhampholeon spectrum'