Invasive SpeciesDasysiphonia

Dasysiphonia japonica
NOT FOUND by joe_cd
ID Confirmed
Quality checked by go science
Peer reviewed by joe_ab
Field Notes
One thing that was interesting that I found was a strange, small krill or some micro-organism thriving in the seaweed. It was also difficult to find a thin piece of seaweed, especially in brown or green seaweed. It was also somewhat challenging to take good photos using ipads. We used microscopes to see very small differences between the samples and Dasysiphonia japonica, so that we would be sure we didn't get Dasysiphonia.
Supporting Evidence
Photo of my evidence.
I think that this not Dasysiphonia Japonica because it does not appear to have axial growth, shepherd’s hooks, and does not have single celled branches. 40x magnification.
Photo of my evidence.
This clearly shows that the branches are not single celled, and has a lot of small cells in the branches, and one of the key signs of Dasysiphonia Japonica, so that already makes it almost impossible to be Dasysiphonia Japonica, and it also does not have shepherd’s hooks. 400x magnification.
Photo of my evidence.
This is definitely not Dasysiphonia Japonica, as it has multiple-celled branches, flatter and broader branches, and doesn’t grow in nearly the same way as Dasysiphonia Japonica does. It also is a grayish colour, not red, pink or reddish brown. In addition it probably doesn’t have shepard’s hooks, though it does have multiple possible buds or pods. 40x magnification.
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


Looks like it's not dasysiphonia! Good photos, too.

I think that each image shows a different species, none of which is Dasysiphonia. The top one looks like Ceramium, a red alga. The middle one looks like Polysiphonia, also a red alga. The bottom one looks to me like a hydroid - an animal - possibly Dynamena.

Thanks for your work on this!
Matt Bracken