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Sea squirts spread along the coast
BAR HARBOR An alien invader is popping up more frequently along the local coastline.
Very few tunicates, the small marine animals more commonly known as sea squirts, are indigenous to the Northeastern United States and Eastern Canada. Yet, there have been plenty of sightings by beachcombers, fishermen, sea farmers and others whose work is focused in and on the sea.
Tunicates come in many varieties. Some look like gelatinous ping pong balls or a clear bubble. Another, called the orange sheath tunicate, is bright orange or red in color with no defined shape.
There is one called star tunicate or golden star tunicate. “It can be lots of colors; mostly I see the black and white version,” said Chris Petersen, who works for College of the Atlantic as the graduate program director and a professor of marine biology, in an email. “To me it is the prettiest one, the zooids are arranged in rosettes … They grow by asexual production, but they a
Tunicates turning up more along Maine’s coast
MOUNT DESERT ISLAND It is not quite the same as “Invasion of the Body Snatchers,” but some of the tunicates that can be seen along the coast more recently look like they could be invasive alien spores.
Actually, they are small marine animals more commonly known as sea squirts. There are large varieties of them from all regions of the Earth. Some share the same basic body parts that humans have, making them a distant relative, according to some sources.
Very few are indigenous to the northeastern United States and eastern Canada and yet there have been plenty of sightings by beachcombers, fishermen, sea farmers and others whose work is focused in and on the sea. Some look like gelatinous ping pong balls or clear bubbles. Another is bright orange or red in color with no defined shape, which is called the orange sheath tunicate.