Megalo

Megalo (メガロ) is a shark that lives on Fishman Island. He is the beloved pet of the Princess Shirahoshi.

Appearance
He has a usual shark design, the only difference is that he wears a shirt from the Criminal fashion line. He is several times larger then the usual shark though is still smaller than Neptune.

Fishman Island Arc
Megalo was first seen being freed from the Kraken accidentally when Luffy attacks it. Later, he tells King Neptune about the pirates, and the king invites them to Ryugu Palace, apparently as an act of gratitude. Megalo then carries Luffy and his companions as they make their way to the castle.

Trivia

 * His name is probably derived from the legendary sea monster/extinct shark species Megalodon.