Description
Halecium halecium consists of a main stem with feather like branches to left and right. The branches are alternating along the stem. These animals catch small pray out of the water and therefore they need a current. This hydroid is also called herring-bone coral, witch has a similar meaning like the Dutch name.

Size
The colony can reach a height of 250 mm.

Colour
The colour can vary from beige-brown to orange-brown. 

Habitat
This hydroid likes hard substrata and turf blocks, from several meters down to large depths.

Distribution
Common in the Oosterschelde.