Found on beach in Atlantic Canada in November.

"Sack" is approx. 2" (approx. 5cm) in length.

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  • 1
    $\begingroup$ any opening, or shell? looks like a n innkeeper worm. $\endgroup$
    – John
    Nov 24, 2017 at 4:11
  • $\begingroup$ Just a guess: en.wikipedia.org/wiki/Sipuncula $\endgroup$
    – bli
    Nov 27, 2017 at 10:10

1 Answer 1


I've actually seen these before during an invertebrate zoology class in Maine! It's a rat-tailed sea cucumber, Caudina arenata. Though I don't have the taxonomic guide book anymore, I found this blog post that cites an old guide with more info about them.


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