Squamosas could probably live in a cup of soda, LOL. They are the same if not more hardy then Derasas. The only reason I know is because I breed squamosas and maximas. Its just sooooooo much fun collecting the "squirtings" whenever they go into convulsions. Outside of that, squamosas have their own little personalities as well (even though clams have everything that a human does outside of a brain - but still a nervous system).
Here's something you may not know. Most clams have "eyes" all over their mantles. This is why they get all messed up and ticked when you wave your hand over their mantle and obstruct the light. Squamosas on the other hand, have eyes only on the edge of their mantle and try to position themselves accordingly. They hate being sideways because they do not have a 360 view of everything. Their "eyes" are also slightly more magnified. They only thing you need to be worried about with Squamosas really is the fact that some of them can be down right aggressive. They like their own area. If there is another clam nearby, they might try to cover its' incurrent siphon with its mantle or cut off its light source. But probably 70% of squamosas will end up flat at some point.
If I had to rate these things by aggressiveness of clams, I would go Squamosa, crocea, derasa, maxima, Gigas then Hippopus. I have just seen some of them do some WEIRD junk like use their byysal to try to crawl up higher and block the light from other clams.
Just feed the thing. Ones that pass a certain size, like that one, usually 2.5 to 3 inches - DO need supplemental feeding. They also filter your water of nitrates, nitrites, blah blah blah. But you can search for something called Tahitian Reef Blend or Coral Frenzy. Both are good foods to feed clams.
