A bull
Europa
Europa.
In Greek mythology, Zeus disguised himself as a cuckoo to seduce the princess Europa. By transforming into a cuckoo, Zeus was able to approach Europa without raising suspicion and then revealed his true form to her. This disguise allowed Zeus to fulfill his desires without facing any consequences or opposition from others.
You may be thinking of the abduction of Europa by Zeus (the Greek Jupiter), who disguised himself in the form of a bull? Wikipedia will give you the details.
zeus fall in love with europa because this girl was pretty and she is the princess of phoenicia
Zeus turned into a bull and tricked Europa upon his back, taking her away to Crete.
Zeus takes Europa to the island of Crete where he reveals his true identity and they have three sons together.
Zeus became a bull to meet Europa. He did this in order to seduce her and carry her away to the island of Crete.
Minos was one of the three sons of Zeus and Europa; Zeus carried Europa across the sea as a bull.
Europa which is one of the moons of Jupiter
It was named after Europa, daughter of the king of Tyre, who became one of Zeus' lovers. (Zeus is the same god a Jupiter).
Zeus seduced Europa in the form of a white bull. He appeared gentle and beautiful, luring Europa to climb on his back before carrying her away to the island of Crete.