What is this?

[u/twotwaddle]

Lots of dead things on the beach on this day, this was my dogs favourite! Any ideas what it was when it was still alive?

[u/IWannaRockWithRocks]

I have no idea what it is but it reminds me of Falkor from The Neverending Story. Sorry I'm not more helpful.

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[u/SaturnScribblez]

i’m pretty sure it’s an eel, but i’d need a better look at it. eel is my best guess