Invasive SpeciesDead man's fingers

Codium fragile
NOT FOUND by Elmosbarnacles
Cape Elizabeth
Not Yet Reviewed by Expert
Quality checked by Kierith, and Aurora
Peer reviewed by Caitlin Gentilini
Field Notes
I'm happy today because I'm at the beach, and I love being in nature with the waves crashing around me. It is also my birthday, which made it extra fun. I see the calm ocean glistening in the sun, seaweed, rocks and boats bobbing up and down due to the gentle breeze. I also smell the sharp scent of seaweed and hear the splashing in tidal pools and people around us talking and laughing. A big problem we ran into was there was so much land to cover, and all the seaweed looked similar making it hard to distinguished a smart place to search. I am surprised we did not find the Dead Man's Fingers because there were lots and lots of seaweed that looked similar to Codium Fragile, but none of them matched the standards we were looking for.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
When you cut into Dead Mans Fingers, you will find that the cytoplasm, more commonly known as cell fluid, oozes out because it does not have cell walls to hold it in. When we cut into the Codium Fragile like seaweed we found, nothing came out which as a result proves that we did not find the Codium Fragile we were looking for.
Photo of my evidence.
A distinct characteristic of an organism is its color. The color pallet of Dead Mans Fingers is a dark green or a cooked spinach color. When we observed our seaweed more closely, we found that it had a mustard green undertone instead of the dark green color we were looking for. Therefore we know we did not find the Dead Mans Fingers.
Photo of my evidence.
We were very enthusiastic when we found this algae because of its dark green color, one of the distinguishing features of Dead Mans Fingers. When we observed it more closely, we found that when it was untangled and spread out it had more of an axial growth pattern verses the dichotomous growth pattern specifically found within Dead Mans Fingers. When it grows dichotomously it means it divides over and over making a tree like shape. When we looked at the thallus cross section from the identification card, we found it was supposed to have more of a round body when compared to ours was flattened with midrib.
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: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 43.561300 °
W -70.218700 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Kettle Cove
Trip date: 
Thu, 2018-10-25 08:45
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Time of low tide: 


Wow, Elmosbarnacles. What great work on your observation. It can be hard to provide evidence as to why you have not found something but you did a very thorough job here.

Keep up the great work!