Sebastian

Sebastian is a Wotan of the false kelpfish fish species, and a member of the World Pirates.

Abilities and Powers
As a Wotan, he likely has incredible strength, and can breathe underwater. He is blind, so he is immune to Boa Hancock's power. However he is still able to sight the enemy and fight him with ease. If these is due to guiding with sounds like normal blind people do or something like Kenbunshoku Haki is unknown.

As a false kelpfish Wotan, he is able to camouflage himself with his surroundings, making it seem like he vanishes into thin air. He is also able to protrude spikes from his body.
 * Camouflage Air (カモフラージュエア): Sebastian camouflages himself to evade his opponent's attack and attack them from behind. He first uses this to evade Boa Hancock's Perfume Femur.
 * Spin Tornado (スピントルネード): Sebastian protrudes spikes from his body and launches himself into a vertical spin at his opponent. This was first used against Luffy, but was deflected by his Gomu Gomu no Gigant Pistol.

Weapons
He wields two sticks with large spikeballs attached.

Fishman Karate
He also seems to be able to use Fishman Karate as he was seen throwing an Uchimizu and a Yabusame, but with a larger size and strength due to his own large size.

Major Battles

 * World Pirates vs. Marines and World Government
 * Sebastian vs. Luffy and Boa Hancock (interrupted by Perona)

Trivia

 * Though Non-Canon, he is the second Wotan seen in the series, the first being Big Pan.
 * Also even if Non-Canon, he is the second main blind character in the series, the first being Fujitora (even tough this events happen before the appearence of Fujitora, the movie was released after his introduction).