Why is my BTA so stretched?

[hfp75]

Ive got 2 types of RBTA in my tank. One type bubbles and the other doesnt. Who knows..... they are both very happy - great color and eat whatever I give them.

One type is a standard RBTA like FishyFish has in the pic & it bubbles.
The other is more like mrhasan's and it doesnt buble.

Same water - same lighting.....

[mrhasan]

Originally Posted by FishyFishy!

They are terribly weird. Mine have always been like that. I have 2 that split into 4. 3 remained like that. The 4th I put under a par38 LED in my frag tank and the bubbles blew up like crazy. So odd.

Here is the mother under T5



And here is the baby under par38

Originally Posted by hfp75

Ive got 2 types of RBTA in my tank. One type bubbles and the other doesnt. Who knows..... they are both very happy - great color and eat whatever I give them.

One type is a standard RBTA like FishyFish has in the pic & it bubbles.
The other is more like mrhasan's and it doesnt buble.

Same water - same lighting.....

Thanks for your inputs; appreciate it Seems like BTAs are known for weird behavior. But I am yet to see one with the coral disk stretched like the one I have; did any of your BTA ever do something like that?