Sifters and Shifters

[pursuit]

What are some types of fish that would be listed as Sifters and some that would be classified as Shifters? Also are there any invertibrates that also get grouped into those categories?

 

[pursuit]

Now in a reef you want sifters not shifters correct or am I wrong? I thought nassarious snail's would be good for a reef.

 

[karajay]

Backwards
You want a shifter...not a sifter. Nass snails are good.

 

[pursuit]

Ok I see I was confused.
Thank you for setting me straight...:yes: