So I have posted this on a couple of other forums and no answers yet...maybe you guys can help? I have a little blue squamosa that has been doing great...it still looks fine actually, except it's sticking it's foot out of it's intake siphon. Has anyone seen this?
Chrissy, your clam actually looks like a blue maxima rather than a squamosa. The color pattern is correct for a squamosa, but the clam appears elongated like a maxima. The incurrent syphon also appears to be smooth rather than having pronounced tentacles. They should be larger than your derasa's syphon tentacles (with respect to each clam's size) and should be branched on the ends. Those details don't show up in your pictures, but have a closer look for a better identification.
For the longest time, I thought my blue maxima was a squamosa. But alas, it's syphon is a smoothie.
I have to wonder if the clam would continue to do this if it's place on a soild substrate like a rock or tile. How exactly to clams bore into rock? I believe Squamosa are rock boring.