Invasive SpeciesDead man's fingers

Codium fragile
NOT FOUND by Marine5
Cape Elizabeth
ID Confirmed
Quality checked by Marine1
Peer reviewed by
Field Notes
Muggy, cold day on the coast of Maine, still we're all happy because we're out near the water. We saw a lot of seaweed and rocks covering the coast where we were sampling. There was a light breeze that brought in the strong smell of the ocean. There were a few problems that we ran into: the rocks were slippery, seaweed made it hard to walk on the rocks as well, and it was the first time we've done this so we were quite rusty. We were surprised we didn't find Codium mixed in with the rocks because we were expecting to find it. However, when we were walking back to the bus, we come across some Codium lying on the beach with some more seaweed. We know it is Codium because it was dark green, it was pencil thick, and it oozed when we ripped off a piece of it. However, there's not enough information to conclude that it grew there or if it just washed up on the shore.
Supporting Evidence
Photo of my evidence.
This is not Codium because: 1) It is not pencil thick. 2) This species has bubbles, Codium does not.
Photo of my evidence.
This is not Codium because: 1) It's flat with a midrib 2) It has bubbles, Codium does not.
Photo of my evidence.
This Is not Codium because: 1) It has a reddish tint. 2) It has bubbles.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Codium fragile
Common name:
Dead man's fingers
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.561150 °
W -70.219760 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Kettle Cove
Trip date: 
Tue, 2011-09-20 09:31
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 
Tue, 2011-09-20 10:49


I heard that you returned to the Kettle Cove area. Did you collect any data using quadrat sampling? Did you see any deadman's fingers on your outing?

Your site looks covered with seaweed. Do you think that your evidence photos document one, two, or three seaweed species? Two of your evidence comments mention seaweed "bubbles." Did you specimens have different types of bubbles or were they all the same in terms of texture and location on the seaweed?

The colors in your third evidence photo are incredible! It's almost better that the weather wasn't great - cameras love gray, overcast days.

Thanks for noting that you found it washed up on the beach nearby. After the fieldwork you did, are you convinced that it's NOT from your study area, or did finding that dead specimen make you want to do a more extensive search?

...oh, and nice numbered evidence approach. Short and sweet and scientific.

When we found the specimen it was still alive, and yes I would love to go back and do a second study! I had a great time and I think it's really interesting to take part in experiments like this!