This video says about itself:
17 September 2013
Metamorphosis of the colonial ascidian, Botrylloides violaceus, imaged by widefield microscopy. During the three-hour period the ampullae extend out over the substrate, and eventually this individual will bud off additional colonies.
In three weeks time 28 non-native species are found of which twelve are new to the Dutch Wadden Sea. Some of these species like Botrylloides violaceus, which is introduced from the NW Pacific, are very brightly coloured.
Botrylloides violaceus is a sea squirt. Like Didemnum vexillum, another new Wadden Sea species. Also two Japanese crab species, including the Asian shore crab, were discovered for the first time ever in the Wadden Sea.
Source: NRC Handelsblad daily, paper edition, 22 September 2009, page 8.
Invasive Alien Species, ranging from disease and plants, to rats and goats, are one of the top three threats to life on this planet, according to a new publication coordinated by the Global Invasive Species Programme (GISP), of which BirdLife International is a partner: here.
The sea squirt offers hope for Alzheimer’s sufferers: here.
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