Help me identify these bivalves, etc. please guys

[paul monfils]

Yes, your shell actually is "ericarum".  I forgot about that one because I use Poppe & Goto's volute book, and ericarum isn't in it since it was described in 1998 and the book was published in 1992. The only difference I can see between ericarum and hamillei is the color pattern, which is not a valid basis for naming a species, so I wonder if ericarum should be considered a form of hamillei. There may be other differences though.  I will have to try to find a detailed descrïption of ericarum.  In any case, your shell is that form/species.

Clam 2 is definitely Tridacna maxima.