Orange mobile(?) blob with tentacles

[karlandtanya]

The two tentacles make it look like some sort of mollusc, but the orange blob makes me think sponge...
In the composite image it seems like it moves its position relative to the rocks while I was photographing it, plus if I look at it 20 minutes later, it's gone -- so mobile.

Does anyone have an idea what this might be?

 

[Crabs McJones]

That is wicked. The black antenna are throwing me for a loop. #reefsquad anyone have an idea?

 

[Bob Loblaw]

...

 

[saltyfilmfolks]

Wow. I got nothing.

 

[saltyhog]

Snail w/ sponge growing on its shell?

That was my only thought. Very cool!

 

[kschweer]

Maybe a stomatella with a sponge.

 

[jsker]

@KJ

 

[Lovemyreef2015]

Reminds me of a two-spot limpet
(Fissurellidea bimaculata)

 

[Big G]

Looks kinda familiar . . .

 

[KJ]

Look like snail with sponge.

 

[jsker]

Looks kinda familiar . . .

;Hilarious;Hilarious;Hilarious

 

[rkpetersen]

Looks kinda familiar . . .

NO KILL I !!!

 

[sixty_reefer]

Very similar shape to a tiger cowry, that colour is doing my head in do

 

[Frtdrmrose7]

Pretty cool!

 

[Katrina71]

That's a 2fer!

 

[reef lover]

+2 snail with sponge...

 

[Backreefing]

Catch it and flip it over ?

 

[jabberwock]

Looks kinda familiar . . .

I'm a doctor Jim, not a stone mason...

 

[Saveafish]

Can we have a pic with a soda can next to it for comparison on size?

 

[karlandtanya]

Can we have a pic with a soda can next to it for comparison on size?

Sorry--it's gone back into the rocks now. FWIW, it was about 7-9mm in diameter.
If it shows up again, I'll stick a piece of 3/16" airstem down there with it for scale.