Lithophyllum incrustans, also known by its common names coraline crust and paint weed,[1][2] is a small pinkish species of seaweed.

[3] This is a small encrusting,[4] calcareous alga, growing epiphytically as a flat lobed plant up to 10 cm in diameter and up to several mm forming thick adherent crusts.

[5] Tetrasporangial and bisporangial conceptacles occur sunken pits.

[6] Plants usually gametangial, Spermatangial conceptacles in shallow chambers.

[5] Found all around the Great Britain, Ireland, the Isle of Mann and the Channel Islands, rarer on the east coast of England.