Native SpeciesCommon sea star

Asterias forbesi
FOUND by RockEel
ID Questioned
Quality checked by C.A
Peer reviewed by M.C
Field Notes
We were happy that we found a great place for our quadrate. We saw a class of people on the rocks, we heard the water crash on the rocks near us, we smelt the salt from the seaweed and water. We were surprised that we found a sea anemone also we were surprised that we didn't find an rock crab.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
We explored the tide pools in Harbor Beach and found a common starfish on a common periwinkle.
Photo of my evidence.
When we explored the tide pools in Harbor beach we were looking for animals in the tide pools and seemed to find a common starfish under a rock.
Photo of my evidence.
Walking along the rocks in Harbor Beach we noticed that a few periwinkles were stuck together.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Asterias forbesi
Common name:
Common sea star
Is it alive?: 
Some dead & some alive
Count of individuals: 
Between 1/2 and 3/4
Flower (plants)
Eggs (animals)
How big is it?: 
2 - 5 cm
Is it male or female?: 
Can't tell
Sampling method: 
Quadrat (randomized- placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.131322 °
W -70.638039 °
Observation Site Information
A photo of our study site.
Coastal - Rocky intertidal
Trip Information
Coastal Rocky Intertidal - York Harbor Beach
Trip date: 
Fri, 2011-05-20 09:00
Town or city: 
Type of investigation: 
Species and Habitat Survey
Portsmouth Harbor - York River
Time of low tide: 
Fri, 2011-05-20 09:24
Habitat Observations
Species diversity: 
27 different species
Evidence of vectors: 
Paved road
Walking trail
Recent disturbance
Water temperature: 
Dissolved oxygen: 


Hey Rockeel,
Nice pictures, especially the study site, and I dig the sketch. There are some beautiful things in tidepools, check out a brittle star I saw once and did a picture:
It looks like you have a great place to explore there. That is definitely a sea star (they aren't fish, so I try to avoid calling them starfish) but I think its a northern sea star, instead of a common star. You can tell the difference by looking at the pattern of white bumps in a line down the middle of each arm. It is quite difficult when they are so small. Keep up the exploration!


Thank you for the comments on our research and pictures. We really appreciate it! We loved you picture of the brittle star! We researched a little on the northern star and saw the difference between the common sea star. We will explore more on Harbor beach and we will post more pictures of the animals that we see. Thanks a ton!

~Rock Eel