Blue ‘black’ squat lobster discovery

This video is about diving in the Oosterschelde estuary in the Netherlands. Animals seen include a normally coloured black squat lobster.

Dutch marine biologists of Stichting ANEMOON report on Sunday 23 November 2014:

Recreational divers have found in 2013 and 2014 two bright blue coloured black squat lobsters in the Oosterschelde. The normal colour of these crustaceans is orange to dark red. Only one in two million animals have this rare blue colour deviation. The fact that two have been detected in our coastal waters shows that the population of squat lobsters is locally very high.

See also here.

Blue black squat lobster, 18 August 2013 (photo: Arne Kuilman)

Lobster molting, video

This is a video about a European lobster in the Oosterschelde estuary in the Netherlands.

When lobsters grow, their old shells become too narrow. So, they have to molt; and emerge, as the video shows, from their old shell with their new shell.

Rob Dekker made the video.

New worm species discovery in the Netherlands

Cirriformia tentaculata in New Zealand

Translated from the Dutch marine biologists of Stichting ANEMOON:

Sunday, October 26, 2014

A new marine worm species, new for the Netherlands, has recently been discovered. Recreational divers found Cirriformia tentaculata in the central Oosterschelde estuary, and published their findings in ‘Het Zeepaardje’, the bimonthly magazine of the Strandwerkgemeenschap. It is not known whether the species has only just appeared on the Dutch coast, or that it had already been present for a long time but had never been discovered before because of its unobtrusive way of life.

Much sea life is hardly visible to the eyes of sport divers. At least 300 species of worms are known from our coastal waters. Many species live hidden in the sand and mud bottoms.

So, probably many worm species in the Netherlands have not been discovered yet.

The origin of annelids: here.

New sea slug discovery in the Netherlands

This video from the USA is called Tiny Nudibranchs of Southern California.

Translated from the Dutch Stichting ANEMOON marine biologists:

Sunday, October 12, 2014

This summer sport divers in the Oosterschelde estuary encountered a new and thus the 58th Dutch sea slug species. This was Aeolidiella sanguinea, for which we propose here as its Dutch name “Verborgen vlokslak” [hidden aeolid nudibranch]. The Dutch name comes from the fact that during the day this slug is inactive, hiding under stones and large shells and is only active at night. As a result, the animals are very difficult to observe for sport divers. This species is identified by the combination of a number of anatomical features and especially the shape of the egg strands.

Dutch harbour porpoises counted

This video is called Harbour Porpoise Species Identification.

Translated from the Dutch cetacean researchers of Stichting Rugvin:

Tuesday, September 30th, 2014

On Sunday, September 28, 2014, volunteers of Stichting Rugvin counted 34 harbour porpoises in the National Park Oosterschelde.

Around half past ten in the morning thirty volunteers departed aboard eight ships in line to the eastern part of the Oosterschelde. Nowhere else in the world the number of porpoises is counted in this way. During the scan, there was not much wind, so the animals were easy to find. A total of 34 porpoises were observed, including at least three mother and calf pairs.

Harbour porpoises in Belgium: here.

Dutch rare sea slug news

This video is about sea slugs in Catalonia in Spain.

Translated from the Dutch Stichting ANEMOON marine biologists:

Sunday, September 28th, 2014

The Aeolidiella alderi sea slug was found on the Dutch coast for the first time in the late autumn of 2012. Since then, it was a rare slug. Only a small number of individuals in the westernmost Oosterschelde estuary were recorded. Very recently, more than one slug was found in the central Oosterschelde near Zierikzee with egg capsules and a single individual near Goes. So, the area where these beautiful sea slug has settled has extended considerably, and it seems the species is reproducing successfully in the Zeeland Delta.

Aeolidiella alderi is a not common slug species on the western European coast. It is known from a limited number of places around the British Isles and at the French coast to the Mediterranean.