Aiptasia?

[Echomsp]

What about these guys?

 

[Krazymuncher]

yea looks like peppermint shrimp

 

[Krazymuncher]

camel shrimp:

they have a longer nose and a hump and have white stripes while peppermint shrimps have a more transparent line

peppermint shrimp:

 

[lapin]

I have seen peppermints referred to as salt water ghost shrimp. Not really a ghost shrimp but peppermints are almost clear with a reddish tint.