[3] Pseudobiceros bedfordi is a large polyclad flatworm approximately 8–10 cm in length.

It has a distinctive pattern consisting of a brown to black background, with multiple transverse, bilateral pink lines around thousands of tightly spaced, bright yellow spots,[4] pink undulating spots with stripes on the sides of the body.

[6] Pseudobiceros bedfordi is found on coral rubble[4] and ledges in back reefs, coastal bays, and in lagoons.

After successfully injecting the other, the spermatozoa stream through their partner's body on their way to ovaries, where they will fertilize the eggs.

The stream is visible through the body tissue of the worm, appearing as pale streaks, like lightning jags.