Big Fish is a wonderful movie but for older family members. There is some brief nudity, naked mermaid shown from the back, then an underwater scene with a brief naked woman swimming by. There area a few swear words (b*tich, sh*t) but if you do watch if with younger kids there is a reference to the fact that Santa Claus & the Easter Bunny is fake. If you have young children that would be difficult to explain.
The movie is magical, a fantasy and goes back in forth in time, from the father's viewpoint of telling tall tales to his son's cynical views of his father and his childhood despite how loving his dad was. It speaks to imagination, to living life big, to marriage, family, and dreaming big dreams. Overall the movie is fantastic but geared to at least those 13 and above.