Acan or Micromussa?

[TCoach]

Purchased this from a tank tear down. I think it is an Acan, what do you think?

 

[Reefsupreme]

That to me is a Acan. Although they were reclassified recently to micromussa after calling them acans for so long it hard to break the habit. Plus Acan sounds better

 

[Nigel35]

Looks like an acan from the size of the polyps. If you had to guess what would be the length of the polyps? Generally micromussa tend to be 7mm across and below and acans are 10 mm and above.

Nigel

 

[TCoach]

I thought the Microsmussa’s had the larger polyps and Acans were smaller.

 

[Nigel35]

I thought the Microsmussa’s had the larger polyps and Acans were smaller.

Acans are larger of the two.

 

[Reefsupreme]

I thought the Microsmussa’s had the larger polyps and Acans were smaller.

They were reclassified and now all of them are micromussa.

 

[devildog_reefing]

That hasn't been a Acan since 2016. Put that next to a actual Acan like Acanthastrea Echinata and see what happens.