Donate Take Action

Join us


Marine Animal Encyclopedia

Thysanozoon Flatworm Thysanozoon nigropapillosum

The highly convoluted edge of the very thin thysanozoon flatworm is prominently displayed with a white outline. The rest of the upper side of the body is black and covered in short papillae, or protuberances, each of which ends in a yellow tip. This gives the flatworm the appearance of being peppered with yellow spots. As is the case with most tropical reef flatworms, little is known of the biology of this species, but the thysanozoon flatworm has been found in association with colonial tunicates and is thought to feed on these and other colonial animals. It has been observed to swim well, rhythmically undulating its wide body. Much of what is known about this and other tropical reef flatworms has come from observations made by recreational divers and photographers. A similar species, Thyanozoon flavomaculatum, is found on Red Sea coral reefs.

Thysanozoon Flatwormzoom image
  • Class Turbellaria
  • Length Up to 3 in (8 cm)
  • Depth 3–100 ft (1–30 m)
  • Habitat Coral reef slopes
  • Distribution Tropical waters of Indian and western Pacific oceans
Thysanozoon Flatworm Habitat Mapzoom image