Sapi

Sapi (サピー) was the fish salesman who sold Sanji the blue-finned elephant tuna which he claimed to have caught himself.

Appearance
He is half fishman and half human. He has a small blue ponytail that resembles a fish fin, and the rest of his hair is shaved. He has tan-ish skin, and seems to be quite muscular. He is seen with a large grin, and wears a dark yellow shirt with horizontal lines on it.

Personality
Judging by his large grin, he was proud of himself for catching such a good fish. Sapi seems to enjoy fishing, and selling fish.

History
In the manga, he met Sanji and just sold him the fish. While in the anime, he told him about a competition that had the blue-finned elephant tuna as a prize.

Abilities and Powers
Being only a half-fishman, he may not have the superhuman strength, or be able to breathe underwater, as other Fishmen do.

He seems to be a skilled fisherman, as he was able to catch a large fish, rare around the East Blue.

Anime and Manga differences
In the anime, his name is Ness.

Trivia

 * He is currently the only known person to be a cross species of a fishman and a human.