Tethya aurantium - Golf ball sponge

Tethya aurantium  (Pallas, 1766)

Golf ball sponge

Selce - house reef, Croatia, 30-8-2017. Specimen A.

Selce - house reef, Croatia, 30-8-2017. Specimen A with Cladocora caespitosa  (Pillow coral - Polkoraal).

Phorbas plumosus

Phorbas plumosus  (Montagu, 1814)

Perranuthnoe, United Kingdom, 31-5-2018. Detail of 3rd photo.

Perranuthnoe, United Kingdom, 31-5-2018. Detail of 3rd photo.

Perranuthnoe, United Kingdom, 31-5-2018. 

Dysidea avara - Pink sponge - Roze stekelspons

Dysidea avara  (Schmidt, 1862)

Pink sponge - Roze stekelspons

Tamariu - housereef, Costa Brava, Spain, 4-6-2015. 

Tamariu - housereef, Costa Brava, Spain, 4-6-2015. Detail of first photo.

Tamariu - housereef, Costa Brava, Spain, 4-6-2015. Detail of first photo.

Haliclona oculata - Mermaid's glove - Geweispons

Haliclona (Haliclona) oculata  (Linnaeus, 1759)

Mermaid's glove - Geweispons

Dreischor - Gemaal, the Netherlands, 21-4-2011.

Zeelandbrug, the Netherlands, 4-12-2024.

Zeelandbrug, the Netherlands, 13-3-2014.

Zeelandbrug, the Netherlands, 10-4-2014.

Zeelandbrug, the Netherlands, 25-3-2025.

Zeelandbrug, the Netherlands, 22-5-2019.

Zeelandbrug, the Netherlands, 4-12-2024.

Zeelandbrug, the Netherlands, 9-3-2023.

Zeelandbrug, the Netherlands, 4-12-2024.

Zeelandbrug, the Netherlands, 4-12-2024.

Zeelandbrug, the Netherlands, 29-8-2018.

Dreischor - Kokrif, the Netherlands, 22-10-2010.

Anna Jacobapolder, the Netherlands, 18-5-2015.

Kistersnol-Borrendamme, the Netherlands, 16-4-2014.

Zeelandbrug, the Netherlands, 13-3-2014.

Zeelandbrug, the Netherlands, 25-9-2013.

Zeelandbrug, the Netherlands, 17-9-2012.

Phorbas tenacior - Bluish encrusting sponge - Blauwige korstspons

Phorbas tenacior  (Topsent, 1925)

Bluish encrusting sponge - Blauwige korstspons 

Cala Nova reef - Tamariu, Spain, 4-6-2015. Specimen A growing on Thylacodes arenarius (Giant worm shell - Grote wormslak).

Cala Nova reef - Tamariu, Spain, 4-6-2015. Specimen A growing on Thylacodes arenarius (Giant worm shell - Grote wormslak), with Clavularia crassa  (Common clavularia - Gewoon kruipkoraal).

Calella reefs, Los Ullastres, Costa Brava, Spain, 3-6-2015. With Oscarella species, Phorbas fictitius and Parazoanthus axinellae  (Yellow cluster anemone).

Petrosia (Petrosia) ficiformis - Stony sponge - Harde vijgspons

Petrosia (Petrosia) ficiformis  (Poiret, 1789)

Stony sponge - Harde vijgspons

Cala Nova reef - Tamariu, Spain, 2-6-2015. Detail of next photo.

Cala Nova reef - Tamariu, Spain, 2-6-2015. 

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).

Sycon ciliatum - Ciliated sponge - Gewone zakspons

Sycon ciliatum  (Fabricius, 1780)

Ciliated sponge - Gewone zakspons

Synonym: Scypha ciliata

Wemeldinge - haven, the Netherlands, 19-8-2023. 

Neeltje Jans - Vluchthaven, the Netherlands, 19-5-2010.

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Sint-Annaland, the Netherlands, 1-3-2017.

Springersdiep, the Netherlands, 6-5-2025.

Neeltje Jans - Getijdenpoel, the Netherlands, 6-5-2011.

Neeltje Jans - Vluchthaven, the Netherlands, 15-7-2017.

Anna Jacobapolder, the Netherlands, 18-5-2015.

Wemeldinge - haven, the Netherlands, 3-7-2010.

Wemeldinge - haven, the Netherlands, 18-7-2015.

Sint-Annaland, the Netherlands, 8-12-2015.

Kattendijke, the Netherlands, 23-5-2009. Detail of next photo.

Kattendijke, the Netherlands, 23-5-2009. 

Wemeldinge - haven, the Netherlands, 9-10-2021. In vitro photo, specimen L: 20 mm, 17-10-2021.