Buccaneers

Buccaneers are a nearly-extinct special race of humanoids taller than average humans but smaller than giants.

Appearance
Buccaneers appear nearly identical to humans, although seemingly large-sized on average. They cannot be easily distinguished from otherwise tall humans without a blood test.

Biology
Buccaneers carry the blood of the giants, suggesting they may be a mixed race.

It is currently unclear whether a child between a buccaneer and a human is considered a "half-buccaneer" or not, as Bartholomew Kuma is only ever referred to as a "buccaneer" despite having a mother from a different race.

It's unknown why Jewelry Bonney is not considered a Buccaneer despite being the daughter of Kuma.

Inter-species Relationships
Buccaneers are said to have committed a great crime against the world in the past, due to which they are forced to hide from the World Government to avoid persecution. If discovered, a buccaneer and their family may be forced into slavery for the World Nobles.

Overall Strength
Buccaneers possess great physical strength even as children.

Beliefs
The legend of the Sun God Nika has been passed down in buccaneer folklore for many generations.

Trivia

 * Buccaneers were a type of privateer or pirate active in the Caribbean Sea during the 17th and 18th centuries.
 * Before the term "buccaneer" became associated with piracy, it instead was used to refer to certain nomadic tribes of the Caribbean, after their specific methods of cooking hunted animals.
 * While Jewelry Bonney is regarded to as a human, it's unknown if she is also biologically part buccaneer from her father's side, though Jaygarcia Saturn claims the race is completely extinct with Kuma being its last member. When she used her Distortion Future, she gained a large and muscular physique resembling that of a buccaneer.