| Aspect: | Looks like a very large unattractive rubbery cucumber, but generally of various shades of brown, from light to dark brown with knob-shaped podia of opposite brown tone (or even yellow). |
| Population: | Common. |
| Notable feature: | Thus called due to its three rows of podia on its "sole", as can be seen on one of the pictures below. |
| Environment: | Sandy and grassy bottoms. |
| Behaviour: | - |