Node yields assume the base harvest HP from game data (e.g. 1000 for Redwood trees, 620 for Metal nodes). In-game, trees and rocks with bAllowHarvestHealthScalinghave per-instance HP that varies with the node's size, so actual yields per node will vary. The values shown represent the average.
These creatures reduce Black Pearl weight when carried in their inventory.
The Diplocaulus is the best Black Pearl farmer with a 32.5x gather multiplier from game data. The Anglerfish is the runner-up with 3x.
The following creatures reduce Black Pearl weight when carried: Grand Tortugar (-90%), Dunkleosteus (-50%), Helicoprion (-50%). This means they can carry more Black Pearl before becoming encumbered.