Why Were Aphrodite's Symbols A Swan , Dolphin , A Rose & The Dove?

The swan=beauty

the dove=peace and love

the rose=love and beauty

the dolphin=from whence she came from... The dolphin came from the ocean and so did she

She was the goddess of Lust,Love.Peace,and Mostly Beauty
dove= peace and love
swan= beauty
rose= love and beauty
dolphin I don't know I think that another god or goddess Symbols

She had good looks and also it says on google you can look on powers of aphrodite