South American sea squirt in Dutch Oosterschelde estuary


This video is about the pleated sea squirt, Styela plicata.

In the spring of 2008, the sea squirt species Corella eumyota (orange-tipped sea squirt) was found for the first time in the Netherlands. That was in the harbour of Burghsluis, at the Oosterschelde estuary.

In 2014 and 2015, it was also found at another Oosterschelde spot, Westbout.

So, this originally South American species seems to be spreading, but slowly.

‘Humpback whale is back in North Sea’


This video is about the young humpback whale, swimming in the Oosterschelde estuary in the Netherlands last weekend.

Translated from NOS TV in the Netherlands:

“Humpback swam back out to sea’

Yesterday, 22:09

The humpback whale seen this weekend in the Oosterschelde estuary is almost certainly back in the North Sea. Cyclists on the storm surge barrier have seen this afternoon that the animal swam out, says the foundation SOS Dolphin.

Earlier today things still looked bad for the whale. It swam in the east of the Oosterschelde and it was questionable whether it could find the “exit” again and whether it would dare. After 14:00, the animal was not seen.

But tonight, Jolanda Meerbeek of SOS Dolphin got a liberating phone call from a family who had cycled over the flood barrier. “At the first pillar they saw a meters long animal swimming out. It was in the lee of the pier and slid as it were into the sea. They also saw it exhale, a great jet emerged from the blowhole. When it was through the barrier, they saw it swim away to the north.”

See also here.

Humpback whale strays into Oosterschelde estuary


This 2014 video says about itself:

During the world circumnavigation with the ‘Oosterschelde‘ we were welcomed by about 6 humpback whales who did a nice performance. This happened on the south-east side of Australia.

Unfortunately, today not so good news from the Oosterschelde estuary after which that ship was named.

This video is about a humpback whale, seen 15 February 2015 near Wemeldinge along the Oosterschelde.

Translated from NOS TV in the Netherlands:

Little hope for humpback in the Oosterschelde

Today, 11:41

In the Oosterschelde, near the Zeeland Bridge this weekend a young humpback whale was spotted. That had never happened before. The animal still swims around. Its survival chances are not big, says the SOS Dolphin Foundation. …

On Saturday, the first report on the humpback came, one day later the animal first appeared on images.

It is unknown how young the animal is, what is its sex, and whether it can survive independently. “It accidentally swum into the Oosterschelde, hunting for fish,” thinks Annemarie van den Berg of SOS Dolphin.

The animal swims at this time in the eastern corner of the Oosterschelde. Not a good sign. “There are just more rivers there, so it is more likely it will get stranded.”

There is still hope. “It swims properly and if the animal find its way back, it’ll be fine,” says Van den Berg. “But porpoises have previously shown that they often do not dare to get back.”

The foundation calls on people to stay away from the animal. Van den Berg: “If people are going to flock to that animal in boats, then it is in big trouble. The boats can block the way back to the North Sea. Then the probability of survival really becomes nil. In addition, the noise may cause a lot of stress and of that it has enough already.”

Rare sea slug, crustacean discoveries in the Netherlands


This video says about itself:

Nudibranch (Archidoris pseudoargus) laying eggs

20 April 2014

Scuba diving outside Kullaberg, southern Sweden. At the wreck Franz we found several nudibranchs mating and some were laying eggs.

Translated from the Dutch marine biologists of Stichting ANEMOON:

On February 7, 2015 the rare sea slug Archidoris pseudoargus was seen in the northwestern Oosterschelde estuary. In the past 30 years, this slug had been found in the waters of Zeeland province only five times previously. What makes the observation even more special is that for the first time in the Netherlands also Doridicola agilis, a parasitic copepod, was found in the gills of a Archidoris pseudoargus slug.

Pilot whale beached in the Netherlands


This video is called Pilot whale & lady swimmer.

Ecomare museum on Texel island in the Netherlands reports today on a cetacean, beached on Schouwen island in Zeeland province on 17 December 2014.

The marine mammal had died a long time before stranding. Much of its body had decomposed. After research at Utrecht University, people found out this was a male long-finned pilot whale.

Another pilot whale beached in the Netherlands: here.

Good northern cowrie year in 2014


This video is about northern cowrie marine snails.

Translated from the Dutch Stichting ANEMOON marine biologists:

Sunday, December 21, 2014

In various places in the Oosterschelde estuary in 2014, Trivia arctica has been more often observed by recreational divers than in previous years. Only in 2001, the first native individual of this mollusk was found in the Oosterschelde. Since then, until 2011, each year more live animals were found by recreational divers. In 2012 and 2013 there were fewer, but in 2014 there were again near Zierikzee so many that they were seen almost every weekend and often by several recreational divers.

The northern cowrie (Trivia arctica) is a small but nevertheless also striking mollusk which belongs to the group of marine snails. The length of the shell is no greater than about 1 centimeter.