Invasive SpeciesCommon periwinkle

Littorina littorea
FOUND by Fluffyunicornpo...
2011-05-20
York
ID Confirmed
Quality checked by Fluffyunicornpowersunite
Peer reviewed by Thetools
Field Notes
I am happy because we are not at school and we are at the beach searching for cool creatures. I see the ocean, hear the waves and smell the salt water. I am surprised we found a bunch of eels and no sea urchins at Harbor Beach in York, Maine.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
They have the same features like dark brown purplish colors, and tiny tip of the spiral which was on a study sheet given to us.
Photo of my evidence.
It was smooth and its aperture was white like a common periwinkles is. It also did not have a lot of color variation.
Photo of my evidence.
The tip on the snail not having ridges like the others and not a rounded tiphelped pick it out from the other snails in the community.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Littorina littorea
Common name:
Common periwinkle
Is it alive?: 
Some dead & some alive
Count of individuals: 
50+
Coverage: 
Between 1/4 and 1/2
Reproduction: 
Eggs (animals)
How big is it?: 
0 - 2 cm
Is it male or female?: 
Can't tell
Sampling method: 
Quadrat (user-placement)
Photo of our sampling method.
Place Studied
We’re sorry, JavaScript is required to view the map. If JavaScript is you may wish to upgrade to a newer browser in order to view this map.
Map this species
Latitude: 
N 43.131320 °
Longitude: 
W -70.637880 °
Observation Site Information
A photo of our study site.
Habitat: 
Coastal - Rocky intertidal
Trip Information
Name:
York Harbor
Trip date: 
Fri, 2011-05-20 19:30
Town or city: 
York
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Coastal
Watershed: 
Piscataqua
Time of low tide: 
Fri, 2011-05-20 08:10
Habitat Observations
Species diversity: 
9 different species
Evidence of vectors: 
Boats
Paved road
Dirt road
Walking trail
People
Water temperature: 
11.5°C
pH: 
7.3
Dissolved oxygen: 
7.0mg/L
Salinity: 
25.0ppt

Comments

Hey wicked powerful unicorns, Nice observation! Your second evidence photo and foggy site photo are my favorite.

What kind of eggs did you find? And do you think 9 different species is normal for Maine tidepools or not?

Nice job guys.