Id help please

[armani4o3]

can anyone tell me what the blue and purple corals are.

 

[fishman1069]

They look like sponge to me. The lfs down here has line rock filled with sponge just like that.

 

[Mike389]

Deffintley a blue ball sponge

 

[tomtoothdoc]

very pretty color sponges.

how long have you had the feather star? how do you feed it? they are so beautiful but tough to keep alive.