Identification:
Pseudoceros leptostichus is a striking flatworm, easily recognized by its elongated body adorned with a single, fine, longitudinal stripe running from head to tail. The body is typically pale pink to beige, and the stripe acts like a visual signature. The edges are smooth and slightly ruffled, enhancing its elegant appearance as it glides across the reef.

Size:
Grows up to 2 – 4 cm in length.

Habitat:
Commonly found on coral rubble, dead coral heads, and sponge-covered substrates, where it blends in well with the reef’s textures and tones.

Depth Range:
3 – 20 meters

Diet:
Presumed to feed on colonial ascidians or small benthic invertebrates, like many other Pseudoceros species.

Reproduction:
Simultaneous hermaphrodite that reproduces via penis fencing, where each individual tries to inseminate the other. Eggs are laid in flat, spiral ribbons.

Fun Fact:
The name “leptostichus” comes from Greek roots meaning “slender line”—a nod to the thin dark stripe that defines this species and helps differentiate it from many of its colorful cousins.