How common are sweeper tentacles in corals?

[Leaellynasaura]

I have always read to beware of them and that some corals need extra room because of them. I have a tank full of coral and I have yet to see a single one.

 

[Crabs McJones]

I have always read to beware of them and that some corals need extra room because of them. I have a tank full of coral and I have yet to see a single one.

Some LPS corals have them, such as galaxea coral, they have sweepers that can sometimes extend 8" away.

 

[NY_Caveman]

Euphyllia can run about 6”. Acans a couple of inches. Watch for them at night. Galaxea are often out all night long. They are very aggressive and seem to hate other corals.

 

[Dsnakes]

I could not believe the sweepers that came out of my Hollywood stunner chalice. Those tiny green eyes put out some 3"+!

 

[Kremis]

they come out at night and length / strength varies from coral to coral. a lot of LPS corals (especially chalices) have sweepers

 

[Denisk]

Usually they’re out at night. However some corals do fine next to eachother hence why we often see euphyllia gardens.

 

[Porpoise Hork]

As others have stated you usually see them at night. I found that if you regularly target feed your corals 2-3 times a week with something like reef-roids or coral frenzy, this greatly reduces the likelihood of sweepers extending out towards other nearby corals.