Translated from Natuurbericht in the Netherlands:
August 19, 2011 8:40
The sea slug Cuthona foliata, very rare in the Netherlands, has been found for the first time ever this weekend in Lake Grevelingen. Recreational divers had never before seen this little gem of our marine biodiversity in Dutch coastal waters.
In 1966, the last individual in the Netherlands had been found. washed up on Texel beach. And never before in the Netherlands underwater pictures of this little sea slug had been made. That changed last weekend. At least four specimens of Cuthona foliata have recently located in the Grevelingen lake.