Yeah, before I thought they always looked like that even when not flaring. Here's an old picture of my halfmoon, looks like a delta or super delta when not flaring:
Whoa... Looking at these old pictures, it seems his color changed a lot. His fins used to looks so... clean. Now they've got a bunch of grey on them where the yellow meets white. Hm... Wait, maybe it's fin rot! Uh oh.