consumer reports`safe fish

web.health/diet/fish/consumerreports`safe fish:
19.2.3: sun
consumerreports 2017:
In the new [gov] guidelines, fish are grouped into
"best choices," "good choices," and "fish to avoid,"
based on their mercury levels.
And the agencies set limits for the amount of fish to eat
from the best and good choices groups,
advising 2*4 ... 3*4 ounce servings per week
of the best choices
or one weekly 4-ounce serving of the good choices.
(For children ages 4 to 7, the serving sizes are 2 ounces.)
cr advice:
Lowest-mercury fish:
sardines,
salmon (wild and Alaska, canned or fresh),
oysters, scallops, shrimp, squid, and tilapia.
A 132-pound woman can safely eat up to
36 ounces per week; [5oz per day]
a 44-pound child can safely eat up to 18 ounces. [2.5oz per day]

oysters are good for omega-3? compare:
474mg omega-3 per oz pacific sardine.
414mg omega-3 per oz atlantic sardine.
356mg omega-3 per oz salmon, red, canned, (Alaska Native)
188mg omega-3 per oz oysters.