You know how to catch a nice big trout with a net?

Answer:
You look for a place in the stream where there's a sunken log or hole where the big ones like to hang out. Every day for a week, you throw in a handful of worms and a chocolate cookie. On the last day, you just throw in the worms. When the trout sticks his head out of the water to see what happened to the chocolate cookie, you catch him with your net!



Note:
This may work on blonde mermaids too.