[3] Urticina eques has a smooth, red column with vertical rows of white tubercles.

In contrast to other similar species, the tubercles are not adhesive and do not normally attract gravel and shell fragments.

It is found on rocks and pilings, in crevices and gullies and favours exposed habitats with fast moving water.

The large eggs, 1,200 μm (0.047 in) in diameter, are produced at intervals, and the release of sperm by the males follows shortly afterwards.

[4] Juveniles of the painted greenling, a species of fish, have a facultative association with Urticina eques.