Kelp is also a game feature of Minecraft.
More information can be found on the Minecraft Wiki at Kelp.

Kelp can be planted in water, and will grow more of itself until a random max height, or until it hits a ceiling. Kelp grants Herbalism XP. Kelp will not grant XP if the Kelp block below it is broken first.

Kelp
Item Details
TypeMaterial
SubtypePlant

For further information, please refer to the Vanilla Minecraft item.

Obtaining

Kelp may be obtained from many ocean biomes in Myrkheim.

Usage

9 Kelp in a crafting table creates Dried Kelp Blocks, a renewable fuel source.