Description
These animals grow in two different forms. The moststriking form is the three-dimensional finger-shaped form, as can be found quite regularly in Zeeland and as shown in the picture. The other form is a two-dimensional mat-shaped form, as often can be found on large leave weeds.

Size
These colonies can reach a height of several centimetres, and cover large areas.

Colour
The colour is light beige, where the zooids are brown.

Habitat
They live from the sub-littoral to a depth of 20 to 30 m.

Distribution
Global distribtion.