This worm actually made me jump back when i found it

[krystinaxlea]

I was readjusting a little log we have and when I picked it up all I saw was a stomach? Part. I literally jumped back, it surprised me. Does anyone know what it is and is it safe for my fish, crabs, snails, and coral/mushroom corals?
They're my main concern obviously and I just want to make sure this thing won't be able to hurt anything in the tank.
I'm still new to this so thank you for all and any help.
Oh it also shrinks up into the big blob looking thing.



Edit:
It now looks like this
And the brown stuff outside the worm has it got bigger? Idk what's going on.

 

[ryanjohn1]

Picture is sorta blurry. But for real I would have jumped too. What a creep

 

[Reefkeepers Archive]

Peanut worm? @ISpeakForTheSeas?

 

[ISpeakForTheSeas]

Peanut worm? @ISpeakForTheSeas?

Yeah, a peanut worm (Sipuncula) would be the most likely. Should be harmless/beneficial.

 

[vetteguy53081]

I was readjusting a little log we have and when I picked it up all I saw was a stomach? Part. I literally jumped back, it surprised me. Does anyone know what it is and is it safe for my fish, crabs, snails, and coral/mushroom corals?
They're my main concern obviously and I just want to make sure this thing won't be able to hurt anything in the tank.
I'm still new to this so thank you for all and any help.
Oh it also shrinks up into the big blob looking thing.



Edit:
It now looks like this
And the brown stuff outside the worm has it got bigger? Idk what's going on.

These freak out many people yet are very reef safe and eat uneaten food and detritus making them very beneficial

 

[krystinaxlea]

These freak out many people yet are very reef safe and eat uneaten food and detritus making them very beneficial

Thank you!!!!

 

[krystinaxlea]

These freak out many people yet are very reef safe and eat uneaten food and detritus making them very beneficial

Thank you so much!!!

 

[krystinaxlea]

Yeah, a peanut worm (Sipuncula) would be the most likely. Should be harmless/beneficial.

Thank you very much!!!

 

[mdpitts]

Awww hellllll. Why did they have to call it a PEANUT worm. Thanks a lot!! I’ll think of this from here on out. I don’t like to kill anything but I’d hate that in my tank.