Nitophyllum punctatum - Spotted scarf weed - Stippeltjeswier

Nitophyllum punctatum  (Stackhouse) Greville, 1830 *

Spotted scarf weed - Stippeltjeswier

Springersdiep, the Netherlands, 9-6-2025.**

Slikken van Flakkee, the Netherlands, 1-8-2022.**

Slikken van Flakkee, the Netherlands, 1-8-2022.**

Slikken van Flakkee, the Netherlands, 1-8-2022. Partly overgrown by Botrylloides violaceus  (Colonial sea squirt - Gewone slingerzakpijp).**

* Luna van der Loos (23-12-2025): In the Netherlands this species was thought to be Nitophyllum stellatocorticatum (also stellato-corticatum), but after DNA testing they all turned out to be Nitophyllum punctatum.

** Identified by Frank Perk (25-12-2025).

Radicilingua mediterranea - Teer pomponwier

Radicilingua mediterranea  M.A. Wolf, Sciuto & A. Sfriso, 2021

Teer pomponwier

Slikken van Flakkee, the Netherlands, 22-6-2022.*

Slikken van Flakkee, the Netherlands, 1-8-2022.

Slikken van Flakkee, the Netherlands, 1-8-2022.

Slikken van Flakkee, the Netherlands, 1-8-2022.

* The first specimen of this species found in the Netherlands. Identification by Luna van der Loos and Frank Perk (2022). 

Pelagella castanea - Bruine plooislak

Pelagella castanea  (Alder & Hancock, 1845)

Bruine plooislak

Synonym: Goniodoris castanea

Neeltje Jans, The Netherlands, 7-7-2016. In vitro photo specimen A, L: 32 mm, 14-7-2016.

Neeltje Jans, The Netherlands, 7-7-2016. In vitro photo specimen A, 14-7-2016.

Neeltje Jans, The Netherlands, 7-7-2016. In vitro photo specimen A, 14-7-2016.

Westbout, the Netherlands, 29-11-2014. In vitro photo, 6-12-2014.

Springersdiep, the Netherlands, 19-1-2022.

Bergse Diepsluis, the Netherlands, 14-8-2023.

Burghsluis - Oost, the Netherlands, 17-11-2012. In vitro photo specimen B, 19-11-2012.

Neeltje Jans, The Netherlands, 7-7-2016. In vitro photo specimen A, 14-7-2016.

Burghsluis - Oost, the Netherlands, 17-11-2012. In vitro photo specimen B, 19-11-2012.

Burghsluis - Oost, the Netherlands, 17-11-2012. In vitro photo specimen B, 19-11-2012.

Neeltje Jans, The Netherlands, 7-7-2016. In vitro photo specimen A, 14-7-2016.

Burghsluis - Oost, the Netherlands, 17-11-2012. In vitro photo specimen B, 19-11-2012.

Neeltje Jans, The Netherlands, 7-7-2016. In vitro photo specimen A, 14-7-2016.

Neeltje Jans, The Netherlands, 7-7-2016. In vitro photo specimen A, on its prey Botrylloides diegensis or violaceus (Colonial sea squirt species - soort Slingerzakpijp), 14-7-2016.

Scharendijke, the Netherlands, 14-12-2015. On its prey Botrylloides diegensis or violaceus (Colonial sea squirt species - soort Slingerzakpijp).

Zeelandbrug, the Netherlands, 25-6-2014. With egg strings on its prey Botrylloides diegensis or violaceus (Colonial sea squirt species - soort Slingerzakpijp).

Vuilnisbelt, the Netherlands, 30-7-2020.

Neeltje Jans - Getijdenpoel, the Netherlands, 24-9-2016.

Hemigrapsus takanoi - Brush-clawed shore crab - Penseelkrab

Hemigrapsus takanoi  Asakura & Watanabe, 2005

Brush-clawed shore crab - Penseelkrab

Sint-Annaland, the Netherlands, 19-3-2019. Male.

Zoetersbout, the Netherlands, 23-4-2014. Male crab eating Cyanea lamarckii (Blue lion's mane - Blauwe haarkwal).

Den Osse - Nieuwe Kerkweg, the Netherlands, 15-11-2016. Male.

Anna Jacobapolder, the Netherlands, 18-8-2020. Male.

Den Osse-Nieuwe Kerkweg, the Netherlands, 29-1-2021. Male cleaning its claw.

Dreischor - Kokrif, the Netherlands. 21-2-2015. Male.

't Koepeltje, the Netherlands, 25-6-2019. With epitoke Nereis species.

Stavenisse - Oostnol-Keetenweg, the Netherlands, 4-2-2022. In vitro photo specimen A, female, carapace width 18 mm, 6-2-2022.

Stavenisse - Oostnol-Keetenweg, the Netherlands, 4-2-2022. In vitro photo specimen A, female, carapace width 18 mm, 6-2-2022.

Dreischor - Kokrif, the Netherlands, 6-2-2014. Three male specimens.

Scharendijke, the Netherlands, 15-12-2016.

Stavenisse - Veerweg, the Netherlands, 30-11-2011. 

Den Osse - Nieuwe Kerkweg, the Netherlands, 7-8-2018. Juvenile male in Codium fragile (Felt-alga - Viltwier). 

Den Osse - Nieuwe Kerkweg, the Netherlands, 7-8-2018. Juvenile female hiding in empty Ostrea edulis gigas (Edible oyster - Platte oester) lined with Botrylloides diegensis or violaceus (soort Slingerzakpijp).

Dreischor - Kokrif, the Netherlands, 18-1-2021. Juvenile.

Watervalletje, the Netherlands, 9-10-2017. Moulting female.

Den Osse - Nieuwe Kerkweg, the Netherlands, 9-6-2017. Two male crabs fighting.

Den Osse - Nieuwe Kerkweg, the Netherlands, 22-11-2016. Male crab fighting Carcinus maenas (Shore crab - Strandkrab).