What is this?

[bossman818]

Anyone seen this before. I thought it was coralline algae until it started moving.

 

[EeyoreIsMySpiritAnimal]

Looks like a flatworm

 

[PharmrJohn]

Yeah, I was thinking Planaria

 

[resortez]

yup, second spirit animal on flatworm

 

[IKD]

Can you get a shot of the other side? Almost looks like antennae through the other side (aka nudibranch)

Never mind, just saw the video