Family

Family, also sometimes called Oretachi wa family! (We are family), is a song sung by the Straw Hat Pirates. Originally, it was sung with only 6 members, but was resung when Robin joined the crew. The song (6 member version) is played during the ending of several of the TV Specials, and was used for a makeshift "ending" for the original TV airing of episode 128, with clips from past episodes.

FUNimation Version
Straw Hats: We may not be related

But the bonds we've created

Are strong enough to call family! (When we're sailing the sea)

When other tides have faded we will still be here--

More than friends we are family!

Luffy: You can go and explore every wave and island in the ocean

But even then you won't find a crew that holds a candle to ours

Nami: The crew on our ship is all misfits

But we're the best misfits around!

Sanji: Abandon logic, we don't use it--

Let go and you're ocean bound!

Usopp: Every day, danger is here

But somehow we all survive!

Straw Hats: We risk our lives on a daily basis, with treasure on our minds—the ultimate find!

Luffy: We're the best in all the sea,

We'll never back down because together we'll succeed!

Straw Hats: We may not be related

But the bonds we've created

Are strong enough to call family! (As long as we're at sea)

When other tides have faded we will still be here--

More than friends we are family!

Trivia

 * The English version of this song is sung during one episode in the FUNimation dub. Because only the shortened version of the song was dubbed—the "insert version"--a full English version has yet to be produced.
 * The song was sung during the Skypiea arc. Episode 166 during the party with the wolf pack.
 * The singers for the FUNimation version are the same people who voice the characters, just like what the original version did.
 * In the FUNimation version of the song Zoro's part was changed. Sanji can be heared singing instead.