I have something similar on my baby maxima I got a few weeks ago. It looks like it's healthy but this is my fist clam so I'm not sure. It is more to the sides than in the middle and I have more of it. The lighting has obviously changed coming to my tank and I have had some issues dialing in my CA reactor. I will post some pics later when the lights come on.

Not a very good pic but I think you can see it. I wonder if it's the same thing?

http://zld.ca/reef/clam-001.jpg

I know nothing about clams other than they are pretty. Who was it that had the clam farm in the fraser valley. He came to Ocean Aquatics and did a presentation on clams a few years ago, he'd most likely be the best person to ask about it.

Doug

Naw, thats normal. I've seen lots of maximas with that gold stripe down the mantle midline. It looks pretty neat from above :biggrin: