Identification:
Pseudoceros nigropunctatus is a vivid and colorful flatworm, instantly recognizable by its white body densely covered in tiny black dots (hence the name nigropunctatus, meaning “black-spotted”). Its orange to yellow margin adds contrast and makes it stand out beautifully against the reef. The body is broad and oval-shaped, with gently undulating edges that ripple as it glides.

Size:
Usually between 2 – 4 cm, but can grow slightly larger.

Habitat:
Often seen crawling over coral rubble, algae-covered rocks, or even exposed coral during the day. It’s a relatively bold species and not particularly shy.

Depth Range:
2 – 25 meters, typically found in shallow coral reefs.

Diet:
Feeds primarily on colonial ascidians, using its muscular pharynx to extract nutrients from its prey.

Reproduction:
Hermaphroditic, engaging in penis fencing like many flatworms. After mating, both individuals may lay eggs in flat, gelatinous ribbons on hard substrates.

Fun Fact:
Despite its flashy appearance, Pseudoceros nigropunctatus relies on aposematic coloration—its bright hues warn predators of its unpalatable chemical defenses, allowing it to cruise the reef without much fear.