Crocea clam mantle extended but not covering upper shell

[stan255]

I have a new crocea clam. Its mantle is extended but it’s not covering the upper part of its shell.

Is this ok? Is it receding?

 

[OrionN]

it looks like it's an injury.

 

[stan255]

I just realized I have it placed at a pretty steep angle. I have since repositioned it to be more at 45 degree angle.

Here is a top down view. You can still see the top bit of the shell exposed.

 

[Mr. Mojo Rising]

Is it staying still or is it trying to move? Why at an angle? It should be steady enough that it can open up comfortably.

 

[gbroadbridge]

I just realized I have it placed at a pretty steep angle. I have since repositioned it to be more at 45 degree angle.

Here is a top down view. You can still see the top bit of the shell exposed.

It looks like the surrounding rocks are preventing it from opening.
They need to be in a clear space.

 

[OrionN]

These injury will heal if what cause it was corrected and the clam otherwise doing well.

 

[ArachnoJoozt]

Looking at this bit of exposed shell I see coraline, which would indicate that the clam hasn't grown in a while. Is there white new shell growth visible when the clam is closed up?
Do you know how much par the clam is in? What kind of lighting?
Also, if I had to guess, my guess would be that I'm looking at a maxima clam with the continuous line of eyes on the rim of the mantle
Edit: reviewed a J. Fatherree yt video on identifying crocea clams and I take back the above

 

[stan255]

Is it staying still or is it trying to move? Why at an angle? It should be steady enough that it can open up comfortably.

Yes, it has tried to move after I moved it higher up and repositioned to be at a 45 degree angle. Previously, it was close to a 90 degree.

It looks like the surrounding rocks are preventing it from opening.
They need to be in a clear space.

These injury will heal if what cause it was corrected and the clam otherwise doing well.

Hopefully! Thanks for your input!

Looking at this bit of exposed shell I see coraline, which would indicate that the clam hasn't grown in a while. Is there white new shell growth visible when the clam is closed up?
Do you know how much par the clam is in? What kind of lighting?
Also, if I had to guess, my guess would be that I'm looking at a maxima clam with the continuous line of eyes on the rim of the mantle
Edit: reviewed a J. Fatherree yt video on identifying crocea clams and I take back the above

Yes, it has white new shell growth. I’ll take another pic when it closes up.

Par is around 200 and I’m going to slowly ramp my lights up over the weeks so it reaches close to 300.

 

[minus9]

I would position the clam so the whole mantle is directly exposed to light, not part of the mantle or on a steep angle. The clam needs to maximize the amount of light that hits its mantle.

 

[stan255]

Yes, it has tried to move after I moved it higher up and repositioned to be at a 45 degree angle. Previously, it was close to a 90 degree.

Hopefully! Thanks for your input!

Yes, it has white new shell growth. I’ll take another pic when it closes up.

Par is around 200 and I’m going to slowly ramp my lights up over the weeks so it reaches close to 300.

Here is a pic of the shell with new growth (I think)

I would position the clam so the whole mantle is directly exposed to light, not part of the mantle or on a steep angle. The clam needs to maximize the amount of light that hits its mantle.

Thanks for your input. He’s now in that position with his mantle right under a Kessil A360. Currently at 50% intensity 12” below the surface. I will slowly ramp up intensity.

 

[minus9]

Here is a pic of the shell with new growth (I think)

Thanks for your input. He’s now in that position with his mantle right under a Kessil A360. Currently at 50% intensity 12” below the surface. I will slowly ramp up intensity.

I would increase intensity a little every day. Also increase the violet channel to match your intensity. I would include 5-10% red and green too.