Characters: Colonies are flat, narrow and elongate, usually with pointed ends. Mouths occur only within the axial furrow, which runs to the tips of the colony. Usually all septo-costae extend from the axial furrow to the perimeter. Tentacles may be extended day and night.
Colour: Pale brown or mottled.
Habitat: Shallow reef environments.
Source reference: Veron (2000). Taxonomic reference: Veron and Pichon (1980). Additional identification guide: Nishihira and Veron (1995).