Polymastia boletiformis - Hedgehog sponge

Polymastia boletiformis  (Lamarck, 1815)

Hedgehog sponge 

Torsvik, Kristiansand, Norway, 18-7-2023. With Protanthea simplex (Sea loch anemone).

Torsvik, Kristiansand, Norway, 18-7-2023. With Protanthea simplex (Sea loch anemone).

Torsvik, Kristiansand, Norway, 18-7-2023. With Protanthea simplex (Sea loch anemone).