So, you could have grunions having a go at it on the shore, and later having a little post-coital repast of grout, but, if not on the qui vive [cross-thread ref.] for fish nets, could end up as gurry at the cannery?

Hmmmm.....sounds grotesquely fishy to me.

*Edit: I will continue to edit this today, wwh, to work in all your g-words.