Something on coral

[SpaceInvader98]

Sorry for bad quality its late at night and used flash. What is this black and yellow thing? Its on this coral.

 

[James M]

They look like bumble bee snails.

 

[SpaceInvader98]

They look like bumble bee snails.

Yeah but they haven't ever moved. It's weird they look like polyps inside the rock

 

[SpaceInvader98]

Update: They react to light. And they react like zoanthids closing up and opening but not all the way.

 

[najer]

I hate to say it but google sundial snails.

 

[Mikedawg]

Yes, sure looks like sundial (harmful to zoas) on left and bumblebee (carnivores for some snail species) on right. I'd pick off any that look like sundials; I keep bumblebees because of color pattern and that they can fit in rock crevices.

 

[SpaceInvader98]

Woww okay take a look at how it retracted. So these are snails? They close and open polyps?