A Prismarine Wall is a decorative wall variant made from Prismarine, featuring a shifting blue-green texture that complements ocean-themed builds. It connects seamlessly with other walls, fences, and solid blocks, making it useful for creating enclosures and adding structural detail. Prismarine Walls can be mined with any pickaxe; otherwise, they drop nothing.

They do not generate naturally and must be crafted using Prismarine or obtained through stonecutting. Like other walls, Prismarine Walls can be placed under a note block to produce a bass drum sound.