Invasive SpeciesDasysiphonia

Dasysiphonia japonica
NOT FOUND by joe_jb
ID Confirmed
Quality checked by go science
Peer reviewed by
Field Notes
We tried to look for red algae which is the color of Dasysiphonia. There was also a lot of brown algae, and it was decomposing so there was a lot of slime. But we found a resolution and dipped the brown algae into water, and all the algae red or brown stuck to it would come off. Then we looked at it under a microscope, determined if it was Dasysiphonia or not, then we took a picture of it.
Supporting Evidence
Photo of my evidence.
There is clearly visible hair or fiber coming off this algae/seaweed. There are single cells, not in the photo, but there is axial growth but no shepards hook.
Photo of my evidence.
This seaweed is brown. There are no branches on this. And there are no visible cells.
Photo of my evidence.
This seaweed is black. It has no cells. Although it has branches, there is no shepards hook.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Dasysiphonia japonica
Common name:
Sampling method: 
Photo of our sampling method.
Place Studied
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Map this species
N 43.828000 °
W -68.895900 °
Observation Site Information
A photo of our study site.
Coastal - Dock
Trip Information
Ragged Island
Trip date: 
Tue, 2017-11-14 14:41
Town or city: 
Type of investigation: 
Species Survey
Eastern Coastal
Time of low tide: 
Tue, 2017-11-14 14:27


The closest possibility is the bottom image, but I'd need to see through the sample to look at cell patterns / arrangements.

Thanks for your help with this!
Matt Bracken