Other authorities claim that the larvae do not need hard substrates on which to settle.

It prefers hard substrates but can be found on rock, gravel, sand and mud.

It has been collected in a bathymetric range between 25 and 230 meters depth, usually on hard substrates.

Insects are crushed before swallowing and sometimes battered against a hard substrate.

Most of holaxonia and sclerazonia, however, do not attach themselves to a hard substrate.

Larvae are pelagic for a couple of weeks before settling onto a hard substrate.

Larvae float around for a couple of weeks before settling onto a hard substrate.

It usually lives in shallow waters, attached to any hard substrate.

In the North Sea, the species is common in all areas with hard substrates.

This is attached along its length to a rock, shell or other hard substrate.