What is the long tentacle on a hammer?

[One Reefing Boi]

It looks like a normal green fluffy tentacle just about 2x as long. It has 2 out right now.
I know they have sweepers but I have only ever seen pictures of sweepers being thin and hair like. This just looks like a normal tentacle that’s extra long.
Is it a feeder tentacle? Does it mean it is hungry? I recently moved it down about 5” to make room for a massive frogspawn I got (4 heads, $40 at LFS) and wanted that to be more of the center piece of the tank.

 

[Caseyoidae]

Just sweepers to fend off other corals probably.

 

[One Reefing Boi]

Just sweepers to fend off other corals probably.

Interesting ok thanks. I mean it seems perfectly happy but they don’t look like sweepers that’s why I was just curious

 

[Caseyoidae]

Sweepers seem to be a pretty good indication the coral is happy:)