Found in a tide pool in the Seattle area. Clearly some kind of filter feeder. Maybe 7" long, 2-3" in diameter. Is it a clam? Can I determine what kind?

Found in a tide pool in the Seattle area. Clearly some kind of filter feeder. Maybe 7" long, 2-3" in diameter. Is it a clam? Can I determine what kind?

Posted Jun 2, 2021, 3:27 AM UTC

164
Channa_Argus1121•

Tunicate.

Fun fact: Young tunicates have a similar anatomy to vertebrates, and they are grouped into chordates.

9
binaryvisionsOP•

Cool, thanks!

Very interesting.

2
PacificKestrel•

It's the siphons of a piddock, which is a type of bivalve. Most likely a Rough Piddock.

1
binaryvisionsOP•

Yep, you nailed it. Perfect, thanks so much.

Piddocks are really interesting little creatures!

1