Atriolum robustum reaches 6 cm in colony. Small colonial ascidian (Didemnidae) Indo-Pacific with body in spherical to oval formations yellow-green to olive-green with common siphons at top, smooth to finely granular surface. Lives from 3 to 25 m on central and western Pacific coral reefs. Forms small colonies attached to corals or rocky substrates. Macro dive photo subject for Indo-Pacific ascidian enthusiasts, less photographed than Polycarpa and Didemnum.
Frequently asked questions
How big is the Robust atriolum?
Robust atriolum (Atriolum robustum) reaches 2–6 cm in length.
At what depth can you find the Robust atriolum?
Robust atriolum is found between 3–25 m deep.
Is the Robust atriolum dangerous to divers?
Danger level: Harmless.
What is the conservation status of the Robust atriolum?
IUCN status: Least concern (LC).
Where can you find the Robust atriolum?
Found in: Asian Pacific, Indian Ocean & Red Sea, Mediterranean.