Invasive SpeciesDasysiphonia

Dasysiphonia japonica
FOUND by CoreA_dr
Cape Elizabeth
ID Confirmed
Quality checked by Go science
Peer reviewed by
Field Notes
Some challenges were making the wet slides, and taking pictures through the microscope. For example, you had to stay really still to take pictures. Also, when we were making wet slides we had to put just enough water in so that it didn't cover the whole slide in water. Total mass of the whole sample - 301.75 grams Total of red algae - 16.1
Supporting Evidence
Photo of my evidence.
This picture shows that I found Dasysiphonia japonica. I took this picture at 40 times magnification. The characteristics of the Dasysiphonia that make me think it is the algae are, the single cells.
Photo of my evidence.
This photo was taken at 100 times magnification. On this picture you can see where the branches are growing from. On this you can see the tips of the branches and how they are growing. Also, when I put this sample in water it lost the shape it had when it was out of water. You can see that on the branches they are single celled and they have rounded tips.
Photo of my evidence.
In this picture you can see that the main branch is multicelled and the side branches are single celled. You can also see that the algae was growing more, because on the main branch there was a tiny side branch growing.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Dasysiphonia japonica
Common name:
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.560707 °
W -70.217293 °
Observation Site Information
A photo of our study site.
Coastal - Dock
Trip Information
Kettle Cove
Trip date: 
Tue, 2015-10-20 10:20
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 
Tue, 2015-10-20 11:08


The second one even shows a reproductive structure!

Absolutely gorgeous photos! I know from personal experience that getting such clear slides where nothing is overlapping is very difficult. I also really liked how started with a zoomed out photo and then zoomed in a little more with each photo. That helped me get a "context" for what I was looking at. Your descriptions really sealed the deal, helping me focus on important features. Fantastic work!

Happy observing,