Ok, I found the Swartalf who turned into a fish in the lake, but I can't catch him. I'm playing as a Sorceress and I've tried casting all of my spells at the lake (I have all of the available spells at reasonable levels ranging from maxed out to ~50), it won't let me use the net and using the Shadow spell to trick him into thinking I've left didn't work either.
I see him jump out of the water once each time I enter the screen so I
know he's there, but he's gone before I have the chance to do something...
Hints rather than flat out answers prefered if possible.
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“Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.” ~Mark Twain