Weird hitchhiker

[Nanoreef523]

can someone please help me I have a weird hitchhiker and I need some one to identify it. I don't know how to post pictures on here though

 

[Humblefish]

Check out the links below for how to post photos:

https://www.reef2reef.com/threads/a...d-photos-as-a-new-thread-or-in-a-post.205640/

https://www.reef2reef.com/threads/how-to-share-photos-from-photobucket.199040/

 

[Nanoreef523]

What is this? Should I remove it or keep it?

 

[Humblefish]

Looks like a sea cucumber to me. But I'm not 100% certain. I would try posting the pic in this forum for a more definitive answer, as well as whether or not it is harmful: https://www.reef2reef.com/forums/general-invert-forum.196/

 

[Humblefish]

Specifically, look at this thread: https://www.reef2reef.com/threads/got-a-hitchhiker-or-unknown-critter-check-here-for-an-id.141496/