First Record of . Looss, 1899 (Digenea: Acanthocolpidae) Metacercariae Parasitising the Pleasure Oyster (Hertlein) from the Mexican Pacific Coast.

The aim of this investigation was to identify the parasites present in the largely understudied pleasure oyster in Sinaloa state in the northwestern Mexican Pacific coast. Inspection of twenty-eight oysters collected on "Ceuta" lagoon revealed the presence of the digenean . (Digenea: Acanthocolpidae) cysts.

Vibrios of the spotted rose snapper Lutjanus guttatus Steindachner, 1869 from northwestern Mexico.

Aim: To characterize and identify vibrios present in wild and cultured juvenile snappers (Lutjanus guttatus) in northwestern Mexico.

Methods And Results: Spotted rose snapper juveniles were collected at four localities in northwestern Mexico. Bacteria were isolated from external lesions, kidney, liver, and spleen from cultured and wild caught organisms.