Acan and Duncan ?'s

[greech]

Sorry if this is in the wrong spot but I posted this in the LPS Keppers forum last night and did not get any responses.

I have had these acans for a while now and was wondering if anyone knew which species they are. They are really fat and puffy almost like pillows and each polyp is fairly round unlike the acans I see online and at my LFS. The solid green frag in the 3rd pic also always have their feeders out (24 hours a day).

Also, I noticed that my Duncan has a bright yellow sponge growing between two of the lower heads. The lower polyps are not always retracted but I got a shot while they were tonight. Will the sponge continue to grow and become a problem for the coral?

Also, are Duncans hard to frag?

 

[Nebthet]

You have acan lords.

Usually sponges don't cause too much of an issue, however keep an eye on it and if the tentacles around this area of your duncan stop coming out then you will need to gently remove the sponge from that area and place it some where else in your tank.