Pseudoceros laingensis is a marine flatworm species that belongs to the Pseudocerotidae family.

"External anatomy: Cream background with widely spaced scattered purple spots.

Each spot is formed by microdots, denser in the middle with fine dots outwards.

Internal anatomy: The male system is formed by branched vas deferens, a rounded oblong seminal vesicle connected to a long and coiled ejaculatory duct, a large oval prostatic vesicle and a long pointed, and narrow cuticular stylet housed in a deep and voluminous antrum.

The female antrum is deep and wide with a narrow and short vagina surrounded by the cement glands.