Sinbad the Sailor(1975)

Arabian Nights: Sindbad no Bouken

Based on the famous tale from The Thousand and One Arabian Nights, this story takes place more than 1200 years ago. The story's hero is the impish Sindbad, a mischievous boy full of curiosity, who one night sneaks into the royal palace to watch the acrobatic performances and learns that a wide world awaits beyond Baghdad.
Hearing of the travels of his uncle Captain Ali, Sindbad decides to become a sailor and travel around the world. Leaving behind a note to his father, young Sindbad boards Captain Ali`s ship and-accompanied by a myna called Sheila-sets out for the greatest adventure of his life.

(Source: AniDB)