The white tubules next to the snail... I know they are alive because they change over time. Last week they appeared to die back to a sort of brown flesh and now the white tubes are back.
They don't appear to move or have any sort of polyp inside the tubes.
The purple thing they're growing on is just a coralline algae skeleton.
Another pic showing multiple patches...
They don't appear to move or have any sort of polyp inside the tubes.
The purple thing they're growing on is just a coralline algae skeleton.
Another pic showing multiple patches...