Celtodoryx ciocalyptoides - Gele wratspons

Celtodoryx ciocalyptoides  (Burton, 1935)

Gele wratspons

Wolphaartsdijk -  Zuidvlietpolderweg, the Netherlands, 15-10-2019.

Wolphaartsdijk -  Zuidvlietpolderweg, the Netherlands, 15-10-2019. With amongst other species Hymeniacidon perlevis  (Piekjesspons).

Wolphaartsdijk -  Zuidvlietpolderweg, the Netherlands, 15-10-2019.

Slikken van Flakkee, the Netherlands, 9-8-2023.

Dreischor - Kokrif, the Netherlands, 16-9-2026.

Zeelandbrug, the Netherlands, 20-10-2019.

Anna Jacobapolder, the Netherlands, 28-2-2019.

Anna Jacobapolder, the Netherlands, 28-2-2019.

Anna Jacobapolder, the Netherlands, 28-2-2019.

Kijkuitpolder, the Netherlands, 11-1-2021.

Slikken van Flakkee, the Netherlands, 9-8-2023.

Slikken van Flakkee, the Netherlands, 9-8-2023.

Slikken van Flakkee, the Netherlands, 9-8-2023.

Anna Jacobapolder, the Netherlands, 19-12-2017.

Sint-Annaland, the Netherlands, 3-4-2018.

Wolphaartsdijk - Wolphaartdijkse Veer, the Netherlands, 14-8-2018.

Dreischor - Kokrif, the Netherlands, 30-1-2024.

Bergse Diepsluis, the Netherlands, 20-10-2022.

Zoetersbout, the Netherlands, 10-1-2020. Photo specimen A.

Zoetersbout, the Netherlands, 10-1-2020. Photo specimen A.

Kijkuitpolder, the Netherlands, 11-1-2021.

Zeelandbrug, the Netherlands, 21-9-2017. With Ophiothrix fragilis (Common brittle star - Brokkelster).

Kats, the Netherlands, 13-1-2021. Photo specimens B. With Sargassum muticum (Wireweed - Japans bessenwier).

Kats, the Netherlands, 13-1-2021. Photo specimens B.

Kats, the Netherlands, 13-1-2021. Photo specimens B.

Slikken van Viane, the Netherlands, 1-9-2018.

Phoronis psammophila - Horseshoe worm - Zandhoefijzerworm

Phoronis psammophila  Cori, 1889

(kind of) Horseshoe worm - Zandhoefijzerworm 

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, diameter of shaft/trunk 0.4 mm, 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 31-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 31-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo specimen A, 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo, 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of two disconnected lophophores ('heads'), 29-8-2026.

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. 

Zeelandbrug, the Netherlands, 28-8-2026. With Celtodoryx ciocalyptoides, Cylista troglodytes, Sepia officinalis and Ericthonius didymus.

Zeelandbrug, the Netherlands, 28-8-2026. With Halichondria panicea, Synarachnactis lloydii, Sabella pavonina, Sepia officinalis and Ericthonius didymus (and several other species).

Zeelandbrug, the Netherlands, 28-8-2026. With Cylista troglodytes and Ericthonius didymus.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of tubes, width 37 mm, 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of detail of tubes (see previous photo), 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photo of a complete specimen, diameter of shaft/trunk 0.4 mm, 9-9-2026.

Zeelandbrug, the Netherlands, 28-8-2026. In vitro photos of a specimen showing its very flexible ampulla (bottom end of the body), 15-9-2026.

Halisarca dujardinii - Weke balletjesspons

Halisarca dujardinii  Johnston, 1842 

Weke balletjesspons

Zeelandbrug, the Netherlands, 20-3-2020.

Zeelandbrug - West, the Netherlands, 13-5-2021.

Zeelandbrug, the Netherlands, 20-3-2020.

Zeelandbrug, the Netherlands, 8-10-2024. Growing on Ascidiella spec.

Zeelandbrug, the Netherlands, 5-6-2023.

Zeelandbrug, the Netherlands, 20-3-2020.

Zeelandbrug - West, the Netherlands, 13-5-2021. Mixed with (yellow) specimens of Celtodoryx ciocalyptoides  (Gele wratspons).

Zeelandbrug, the Netherlands, 18-7-2024. At the top left Antiopella cristata  (Crystal sea slug - Blauwtipje).

Zeelandbrug, the Netherlands, 24-4-2020. At the top the flat variety of Hymeniacidon perlevis  (Bleke piekjesspons).

Zeelandbrug, the Netherlands, 24-4-2020.

Zeelandbrug, the Netherlands, 20-3-2020.

Zeelandbrug, the Netherlands, 20-3-2020.