Yarukiman Mangrove

Yarukiman Mangrove are giant stripped trees that have large roots. These trees produce a resin that creates forms; from the forms, the bubble would be produced, which would pop if taken away from the area of trees. This resin is used for coating ships, allowing them to submerse to incredible depths. This process is necessary for ships that wishes to enter Fishman Island. 79 of these trees make up the entire Sabaody Archipelago.

Trivia

 * The trees' name is a pun on the Japanese phrase, "Yaru Ki Manman", which means being pumped up or motivated.