Thanks for the info everyone.
A couple of weeks ago I did end up going to a lake that is known to have pikes and I saw some. My buddy Roberto (rcerdena) managed to get three of them. I only saw one that was worth shooting but I just missed him as he was swimming away. Since this was only the second time I really went spearfishing my reflexes are pretty slow so that gave the pike ample time to start swimming away before I aligned for the shot. The water was murky and there was little sun out so it was hard to spot them. It was a pretty big lake but we got lucky, there were lots of dense weeds near our entry point so we didn't have to do too much searching.
Here's a picture of the days catch, I ended up catching one bass, Roberto caught the rest
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