Grimm Painting

Do any of you know what painting this is, or who made it?

(ignore the lamp on the right)

It appears to be a woman/nymph in the ocean casting a net.  I saw it in the background in an episode of Grimm (season 2, episode 20, "Kiss of the Muse"), and, due to my love of all things Poseidon, decided it needed to be in my life.

A potential clue:  This episode of Grimm was filmed in Portland, Oregon, and the large amounts of artwork in the episode may have come from local artists?

If I can't find it, I will have to end up painting it, but I am extremely reluctant to copy something that is obviously someone else's work.

Help me!