Dragon (animal)

Dragon: is an animal in the world of One Piece. It is a dragon, or a reptile of some sort, capable of flight.

Sennenryu (Filler Species)
A Sennenryu (千年竜, Sennen Ryuu) or Thousand Year Dragon. They come from Warship Island's mostly submerged Dragon's Nest.

They only appear in the anime only Warship Island Arc but are also referenced in the Ocean's Dream arc.

First Appearance: Episode 55

Wano Dragon (Canon Species)
Oda had recently mixed the Monsters story to the One Piece main story. Hogback remarked that Ryuuma has slain a Dragon in Wano Country.

Tashinoko Dragon (Game Species)
A dragon that appears in One Piece Dragon Dream game. It is the seahorse dragon.

This dragn also appears at the anime Ocean's Dream Arc which features it as the main villian who has the power to manipulate minds and memories and also has the power to cast illusions from the memories he gather. He somehow manipulates the mind of a young kid named Noko/Dream that somehow has the power of the nemu nemu no mi that helps him to eas the memories of its victim faster.