What can this be?

[fishdude123]

Small Worm on the glass.

 

[Gumbies R Us]

@ISpeakForTheSeas

 

[PolypPocket]

I’m probably wrong but it looks like a tiny Nudibranch or sea slug. It has those bunny ears they do.

 

[EnterName]

I second nudibranch. A proper identification would require seeing it's other side with decent quality. I would take it out and put it into a small container under white light to take proper pictures.

Most nudis won't survive in a reef tank for long as they have a highly specialized diets that are hard to provide. Some eat certain corals which can be problematic (or helpful in case of Berghia nudis), but I can't tell you the species of the one in your video.

It doesn't look like Berghia to me, but the quality is low and without seeing the back it's hard to tell.

 

[fishdude123]

I think they this may be a

​

'vayssierea felis' sea slug​

 

[EnterName]

I think they this may be a

​

'vayssierea felis' sea slug​

Not saying you are wrong, but this would be a very pale one, wouldn't it?

I had one of those recently (Page 6, first post. Overall post 101): https://www.reef2reef.com/threads/microscopy-thread.1138845/post-14449376

 

[PolypPocket]

I think they this may be a

​

'vayssierea felis' sea slug​

Is it orange? It looked white to me on the video

 

[fishdude123]

Is it orange? It looked white to me on the video

yes it was orange, it looks kind of pink in the video

 

[PolypPocket]

Is it orange? It looked white to me on the video

yes it was orange, it looks kind of pink in the video

Oh then that may be right

 

[EnterName]

You can test the Vayssierea felis ID by putting the hitchhiker in a container with tank water and a few scraped off spirorbid worms. It might take a few hours but the nudibranch should start eating them.