In this particular species, its green colouration comes from an alga which lives within the sponge in shallow sunny areas. In more shaded areas, it can be a more beige colour.

Behaviour

Sponges are not mobile and attach to hard substrate. They are shaped to create a flow of water through their body, from which food particles can be filtered out.

Size

Up to 15 cm.

Status

Common.

Distribution

All around Scotland in rocky areas.

When to see

All year.

Facts

Its common name comes from its granular texture, which resembles breadcrumbs!