No idea what this is....

[Sobiech]

Can someone please provide some insight as to what this guy is. I found him in the sand on accident. He constantly changed in size from about 1” to 2”. Thanks!!!

 

[Crabs McJones]

A very dark peanut worm? I've never seen them black before though

 

[BranchingHammer]

+1 Eunicid/peanut worm

 

[Sobiech]

Thanks so much for the help! I’ll be doing some research on them now.

 

[Star reefer3]

Peanut worm