This newly arrived invasive weed extend throughout the entire New England Coast. My research suggests it first appeared here in 2009. iNaturlist does not recognize it yet, but please read the info at these links:

https://en.wikipedia.org/wiki/Red_algae

http://www.northeastern.edu/cos/marinescience/tag/dasysiphonia-japonica/

https://www.unh.edu/unhtoday/news/release/2017/05/04/unh-researchers-find-significant-increase-invasive-seaweed-changing-sea

http://www.fosters.com/news/20170813/invasive-seaweed-threatens-gulf-of-maine

https://www.boston.com/uncategorized/noprimarytagmatch/2012/06/27/invasive-seaweed-threatens-environment-along-new-england-coast

http://www.pressherald.com/2012/12/03/invasive-red-seaweed-thrives-on-east-coast_2012-12-03/

Thank you.