For a long time I have looked for a good picture of the hitch baitfish. Recently, Cody B found what I was looking for and very graciously sent me the link. Check out the pics below and you will understand why baits like the 5" big hammer and the 9" MS Slammer are so effective at Clear Lake.

Big spawning hitch
http://www.calfishing.com/dcforum/User_files/3bf20cc92ff94281.jpg

Small one
http://www.calfishing.com/dcforum/User_files/3bf20d4030f6653a.jpg

School of spawning hitch
http://www.calfishing.com/dcforum/User_files/3bf20cd82ffec7f1.jpg