Worm Identification Please

[rc1626]

I will be upgrading my tank soon. In the process of breaking down my current tank and while siphoning out the sand I’ve found a few of these worms. Any idea what kind they are? Good or bad? Any help appreciated!!!

 

[EeyoreIsMySpiritAnimal]

Possibly Oenone fulgida

 

[rc1626]

Thank you! Sorry about the title. Autocorrect that I missed. Should say worm obviously.

Mods if you see it if you could fix.
Thank you!

 

[Mr_Knightley]

Those are not annelids, they almost look like cucumbers to me based on the pentagonal cross sections. @ISpeakForTheSeas any ideas on exact species?
Whatever they are, they look amazing and you should keep them.

 

[EeyoreIsMySpiritAnimal]

Thank you! Sorry about the title. Autocorrect that I missed. Should say worm obviously.

Mods if you see it if you could fix.
Thank you!

Click "report" and request the change there. It's highly unlikely a mod will see the thread otherwise

 

[ISpeakForTheSeas]

Those are not annelids, they almost look like cucumbers to me based on the pentagonal cross sections. @ISpeakForTheSeas any ideas on exact species?
Whatever they are, they look amazing and you should keep them.

I'm thinking sea cucumber myself, probably a Synaptid species, but I'm not sure which genus.

 

[EeyoreIsMySpiritAnimal]

I'm thinking sea cucumber myself, probably a Synaptid species, but I'm not sure which genus.

Glad to be wrong! Oenone fulgida would not be good

 

[Peace River]

Thank you! Sorry about the title. Autocorrect that I missed. Should say worm obviously.

Mods if you see it if you could fix.
Thank you!

Title fixed...now back to the worm!!!

 

[rc1626]

Thanks so much for the replies. Unfortunately neither of the two holding tanks I have are using sand. There is plenty of rock but not sure if they are just sand sifters or can they hide in rock as well? New tank is still about a month away from setup so we’ll see what happens.

And I did report the thread so hopefully a fix is coming.

Thanks again all!!!

 

[rc1626]

Title fixed...now back to the worm!!!

Thank you!!!

 

[ISpeakForTheSeas]

Thanks so much for the replies. Unfortunately neither of the two holding tanks I have are using sand. There is plenty of rock but not sure if they are just sand sifters or can they hide in rock as well? New tank is still about a month away from setup so we’ll see what happens.

And I did report the thread so hopefully a fix is coming.

Thanks again all!!!

Synaptid cucumbers tend to be deposit feeders (typically, deposit-feeding cukes are sand-sifters), but a number of Synaptid species are in that they basically scrape food particles off of surfaces with their oral tentacles rather than sifting sand to feed - which surface they prefer to scrape food off of depends on the individual species.

That said, if you found these in the sand, then I would assume they're sand-sifters; to feed them, you can take something like a bowl or tupperware container, fill it with sand, and mix some food into the sand for them to find.