Clam ID. Tricky one.

[campaign000]

It looks like Derasa to me, but the scutes?
Squamosa?

 

[DSC reef]

The slim profile leads me to believe it's a derasa. The schutes and pattern on the mantle have squamosa characteristics but I'm still leaning towards derasa.

 

[Tahoe61]

Looks like a Derasa to me as well.

 

[Bongo Shrimp]

For sure T. derasa

 

[campaign000]

The slim profile leads me to believe it's a derasa. The schutes and pattern on the mantle have squamosa characteristics but I'm still leaning towards derasa.

Thank you all guys!
I'm from China and it's the first tine I got a scaly derasa. Is it common in US?