Aurelia aurita or Aurelia coerulea - Moon jellyfish - Oorkwal

Aurelia aurita  (Linnaeus, 1758) or Aurelia coerulea  von Lendenfeld, 1884*

(kind of) Moon jellyfish - (soort) Oorkwal

Dreischor - Kokrif, the Netherlands, 25-4-2018.**

Den Osse - Nieuwe Kerkweg, the Netherlands, 12-4-2017.**

Den Osse - Nieuwe Kerkweg, the Netherlands, 5-4-2011.**

Bergse Diepsluis, the Netherlands, 24-5-2013.**

Slikken van Flakkee, the Netherlands, 18-8-2022.

Slikken van Flakkee, the Netherlands, 18-8-2022.

Slikken van Flakkee, the Netherlands, 18-8-2022. Specimen A.

Slikken van Flakkee, the Netherlands, 18-8-2022. Specimen A.

Slikken van Flakkee, the Netherlands, 18-8-2022.

Bergse Diepsluis, the Netherlands, 28-5-2020.

Slikken van Flakkee, the Netherlands, 18-8-2022.

Slikken van Flakkee, the Netherlands, 18-8-2022.

Slikken van Flakkee, the Netherlands, 18-8-2022.

Slikken van Flakkee, the Netherlands, 18-8-2022.

Slikken van Flakkee, the Netherlands, 18-8-2022.

Bergse Diepsluis, the Netherlands, 28-5-2020.

Dreischor - Kokrif, the Netherlands, 14-7-2014. Female spreading eggs.**

Bergse Diepsluis, the Netherlands, 24-5-2013. With Hyperia galba.**

Springersdiep, the Netherlands, 9-6-2025. With Hyperia galba.

Slikken van Flakkee, the Netherlands, 9-8-2023. Specimen with flipped hood.

Bergse Diepsluis, the Netherlands, 20-10-2022. Polyp specimens B.

Bergse Diepsluis, the Netherlands, 20-10-2022. Polyp specimens B.

Dreischor - Kokrif, the Netherlands, 22-10-2010. Polyp specimens C.**

Dreischor - Kokrif, the Netherlands, 22-10-2010. Polyp specimens C.**

Dreischor - Kokrif, the Netherlands, 3-12-2015. Polyps.**

Wemeldinge - haven, the Netherlands, 25-2-2023. In vitro photo ephyra specimen D, L: 2.5 mm, 8-3-2023.

Wemeldinge - haven, the Netherlands, 25-2-2023. Montage in vitro photo's ephyra specimen D, 8-3-2023.

Blokkendam, the Netherlands, 27-6-2017. Tritia reticulata feeding on Aurelia aurita.**

Vuilnisbelt, the Netherlands, 20-7-2020. Cylista troglodytes and Polybius holsatus feeding on Aurelia.

Dreischor - Kokrif, the Netherlands, 14-7-2014. Metridium senile trying to catch an Aurelia.**

Slikken van Flakkee, the Netherlands, 1-8-2022. Sagartia undata devouring an Aurelia. 

* In the Netherlands both species are found since the summer of 2020. Studies show that both Aurelia species can hardly be distinguished from each other based on only morphological characters. 

Publication: Gittenberger, A.; Rensing, M.; Faasse, M.; van Walraven, L.; Smolders, S.; Keeler Perez, H.; Gittenberger, E. Non-Indigenous Species Dynamics in Time and Space within the Coastal Waters of TheNetherlands. Diversity 2023, 15, 719. https://doi.org/10.3390/d15060719

** Considering the date of the photo, this is very likely Aurelia aurita. 

Actinothoe sphyrodeta - White-striped anemone - Margrietje

Actinothoe sphyrodeta (Gosse, 1858)

White-striped anemone - Margrietje

Syn. Sandalled anemone

Portrush, Northern-Ireland, United Kingdom, 15-7-2011.

Portrush, Northern-Ireland, United Kingdom, 15-7-2011.

Saint John’s Point, Killultan, Ireland, 27-7-2011.

Saint John’s Point, Killultan, Ireland, 25-7-2011.

North Sea - Belgium*, 16-8-2023. In vitro photo specimen A, oral disc 8 mm wide, 1 of 10 specimens (this was the largest) on a shattered carapace of Maja brachydactyla, 23-8-2023.

North Sea - Belgium*, 16-8-2023. In vitro photo specimen A, 23-8-2023.

North Sea - Belgium*, 16-8-2023. In vitro photo of a relocated specimen (1 of 10), 23-8-2023.

North Sea - Belgium*, 16-8-2023. In vitro photo of 3 of 10 specimens on a shattered carapace of Maja brachydactyla, 23-8-2023.

North Sea - Belgium*, 16-8-2023. In vitro photo of 6 of 10 specimens on a shattered carapace of Maja brachydactyla, (specimen A: top-middle), 23-8-2023. Also tiny specimen with its tentacles withdrawn of Sagartia undata.

Original specimen Westhove - Domburg, the Netherlands, 7-2020. In vitro photo specimens B, 21-6-2021.

Original specimen Westhove - Domburg, the Netherlands, 7-2020. In vitro photo specimens B, 21-6-2021.

Algarve, Portugal, 11-9-2006.

Wimereux, France, 23-8-2014.

* Collected with the VLIZ research vessel RV Simon Stevin, track 1, coordinates: start 51° 30.360’ N – 2° 39.047’ E - stop 51° 31.539’ N – 2° 39.384’ E

Sagartia undata - Small snakelocks anemone - Weduweroos

Sagartia undata  (Müller, 1778) 

Small snakelocks anemone - Weduweroos 

Synonym: Sagartiogeton undatus, Cylista undata

Den Osse - Nieuwe Kerkweg, the Netherlands, 5-4-2011. Specimen A.

Den Osse - Nieuwe Kerkweg, the Netherlands, 5-4-2011. Specimen A.

Den Osse - Nieuwe Kerkweg, the Netherlands, 20-10-2017.

Den Osse - Nieuwe Kerkweg, the Netherlands, 29-1-2021.

Dreischor - Kokrif, the Netherlands, 14-7-2014.

Bergse Diepsluis - Oesterdam, the Netherlands, 24-5-2013.

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

Meerzicht, Grevelingenmeer, the Netherlands, 25-8-2010. Specimen with 'crinkle tentacles'.

Den Osse - Nieuwe Kerkweg, the Netherlands, 29-1-2021.