Does anyone know what this is

[donkey88]

 

[Rob&Gab]

i for get but i no they will sting the heck out of your coral.

 

[ritter6788]

Did that just appear there? Did you just add new liverock? Looks almost like some kind of scallop from the pics.

 

[donkey88]

thanks i have to find them and get them out only good thing is i don't have any corals in hawaii nobody wants to sell me any.

 

[donkey88]

got some feather dusters with some sponge and put it in the tank and seen two

 

[CoralMD]

I've seen some similar ones but the "body" is throwing me off

 

[Joeysreef]

it looks like a monster aptasia

 

[Squishie89]

Looks like a severely bleached scallop.

 

[Crinomau]

It looks like a clam from the genus Lima (maybe?), many of them are whitish yellow or pink.