Native SpeciesNorthern sea star

Asterias rubens
NOT FOUND by BirthdayBuddies828
2017-10-24
Cape Elizabeth
ID Confirmed
Quality checked by Ms. Fanning
Peer reviewed by The Flash
Field Notes
The infamous stench of the beach filled the bitter air as we stepped off of the bus. The waves crashed against the eroded rocks and the wind blew fiercely. The air was chilled and moist. Clouds filled the sky, but the sun peeked through at times. Tidal pools were scattered around the sandy beach and there was an excessive amount of slimy seaweed covering the slippery rocks. The tide was coming in as the exploration began at a little after 9:30 am. There seemed to be an abundance of periwinkles and crabs, but few other species were out. The goal was to locate the Northern Sea Star (Asterias Rubens) to help control the spread of invasive species.The Asterias Rubens is a five limbed creature that comes in variety of colors and sizes. Unfortunately, it was not found. Vital Signs had issued a field mission page telling of the possible disappearance of the species from the Gulf of Maine, so the chances of finding it were slim. Overall, the trip was very enjoyable despite being unable to locate the species.
Supporting Evidence
Photo of my evidence.
The Asterias Rubens was not found on Kettle Cove Beach. The Asterias Rubens does not have claws, but the specimen in the photograph does. This specimen also has antennae, whereas the Asterias Rubens does not. This is not the Forbes’ Sea Star due to the fact that it also has no claws. The Rock Crab is believed to have been found due to the spines along the edge of the shell, which is a distinctive characteristic of the Rock Crab. The species that was discovered, the Rock Crab, and the Asterias Rubens do not have any similar features, therefore it was not found on Kettle Cove Beach.
Photo of my evidence.
The Asterias Rubens was not found on Kettle Cove Beach. The specimen that was found did not have tube feet in rows of four down the center of each arm. It also did not have a filter plate. The color of the oral side of the Asterias Rubens is a pale, off-white. This species has a yellow underside similar to tea stained paper. This species is not a Forbes’ Sea Star, a species commonly confused with the Asterias Rubens, because it has an exoskeleton and the Forbes’ Sea Star does not. It is thought that this species is a Rock Crab because its legs are long and thick with pointed tips. Those are common characteristics of the Rock Crab. Since the specimen pictured does not share any qualities with the Asterias Rubens, it was not found.
Photo of my evidence.
The Asterias Rubens was not found at Kettle Cove Beach. According to the Species ID Sheet, it is an echinoderm. The species that was found is a crustacean due to its shell. For the same reason this is not the Forbes’ Sea Star because that is also an echinoderm. The species pictured also does not have five arms connected to a central disk. It is believed that the specimen pictured is a Rock Crab due to the color. According to Vital Signs, the Rock Crab’s shell is actually yellow, but it may be covered with many purple dots that give it a reddish brown appearance. The attributes mentioned are immensely important to the Asterias Rubens. Since the species that was found does not have any of them, it must not be the Asterias Rubens.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Asterias rubens
Common name:
Northern sea star
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
Latitude: 
N 43.561100 °
Longitude: 
W -70.217500 °
Observation Site Information
A photo of our study site.
Habitat: 
Coastal - Rocky intertidal
Trip Information
Name:
Kettle Cove
Trip date: 
Tue, 2017-10-24 09:30
Town or city: 
Cape Elizabeth
Type of investigation: 
Species Survey
Ecosystem: 
Coastal
Watershed: 
Presumpscot
Time of low tide: 
Tue, 2017-10-24 08:26
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