Scientific Name: Acanthozoon / Thysanozoon sp. (undetermined)
Common Name: Flatworm (unidentified species)

Adult Size: 20 – 60 mm
Depth Range: 3 – 25 m; most common on shallow reefs, coral rubble, and sandy patches
Biotope / Habitat: Found gliding over coral heads, rubble zones, sponges, and algae-covered substrates. Prefers sheltered reef areas with abundant micro-invertebrates
Diet: Carnivorous; feeds on small sessile invertebrates such as ascidians, bryozoans, and tiny worms. Uses its ruffled body and sensitive underside to locate prey
Reproduction: Capable of both sexual reproduction and fragmentation. Flatworms are simultaneous hermaphrodites and engage in “penis fencing,” where the first to inseminate the other becomes the “male.” Eggs are deposited as tiny clusters on hard substrate
Fun Fact: Acanthozoon and Thysanozoon species both show spectacular ruffled margins that ripple like a flying carpet when they swim. Their colours and patterns vary wildly, making them some of the most visually striking flatworms on the reef.

Elegant, fluid, and hypnotic, this unidentified flatworm is a true highlight for macro enthusiasts. Whether gliding across the reef or swimming with wave-like motions, it adds a touch of mystery and beauty to any dive.