cranecoastaleducation 的鑑定

Common name(s): Eastern Mud Sail
Location found: On the muddy bottom of a tidal creek next to a salt marsh in Ipswich, MA
Habitat types: Found in intertidal areas with a muddy bottom
Physical description: 15mm-30mm long, with a shell that has 5-6 whorls the shelly is faintly decorated with beaded lines.
Fun fact: While native in Massachusetts Tritia obsoleta is an invasive species in San Francisco Bay
https://www.exoticsguide.org/ilyanassa_obsoleta

Common name: Eastern Oyster
Scientific name: Crassostrea virginica

Habitat types: prefer less saline environments, intertidal to subtidal

Observed: Walking along the marsh in Ipswich, in the muddy region of the bank with low water levels (low tide).

Physical description: white, oval shape, with some barnacles growing on it.

Fun fact: Oysters get their "flavor" from the environment they live in, since they are water filters it depends on the sediments and salinity levels.

Used the Martinez guide: Marine Life of the North Atlantic to identify.

Common name(s): Eastern Mud Sail
Location found: On the muddy bottom of a tidal creek next to a salt marsh in Ipswich, MA
Habitat types: Found in intertidal areas with a muddy bottom
Physical description: 15mm-30mm long, with a shell that has 5-6 whorls the shelly is faintly decorated with beaded lines.
Fun fact: While native in Massachusetts Tritia obsoleta is an invasive species in San Francisco Bay
https://www.exoticsguide.org/ilyanassa_obsoleta