On Tue, 6 Oct 2020 14:13:50 -0700 (PDT), RichD wrote:

> I read something a few month back, can't recall the source,
> warning about tainted mussels.
>
> Said first, toss out any which open before cooking *
> (steaming). * Then, discard any which fail to open as
> they ought, ~ 5 minutes.

Kitchen Myth.

-sw