LA FDA y los Organismos internacionales relacionados con la Nutrición recomiendan el consumo de pescado con niveles altos de ácidos omega 3 (principalmente EPA y DHA, unos 500 mg/dia)) y bajos en mercurio. He aquí una tabla de sus valores en pescados y mariscos:

Contenidos en ácidos omega-3 (mg)  y en mercurio (microg) por 115 g de pescado cocinado

Valores obtenidos a partir de: http://www.fda.gov/food/foodborneillnesscontaminants/metals/ucm393070.htm

Pescado                                             mg EPA+DHA                                        mg mercurio

Salmón                                                1200-2400                                                          2

Anchoas, arenques                           2300-2400                                                          5-10

Caballa                                                1350-2100                                                          8-13

Atún rojo, albacora                          1700                                                                     54-58

Sardinas                                            1100-1600                                                          2

Ostras                                                1550                                                                     2

Truchas agua dulce                         1000-1100                                                          11

Atún blanco enlatado                     1000                                                                     40

Mejillones                                         900                                                                       ¿

Salmón rosa                                     700-900                                                               2

Calamar                                            750                                                                       11

Abadejo                                             600                                                                       6

Pez aguja                                           250-1030                                                            69

Cangrejos                                          200-550                                                               9

Lenguado                                           350                                                                       7

Almejas                                              200-300                                                               1

Atún claro enlatado                        150-300                                                               13

Bagre                                                  100-250                                                               7

Bacalao                                               200                                                                       14

Vieiras                                                200                                                                       8

Merluza                                              200                                                                       2-5

Langosta                                            200                                                                       47

Cangrejo rio                                      200                                                                       5

Tilapia                                                150                                                                       2

Camarón                                            100                                                                       1

NO DEBERÍAN SER CONSUMIDOS POR EMBARAZADAS NI NIÑOS, LOS SIGUIENTES:

Tiburón                                              1250                                                                     151

Blanquillo                                         1000                                                                     219

Pez espada                                        1000                                                                     147

Caballa gigante                                450                                                                       110