Man these things have been plauging my big boat down in the delta. As soon as I open all my hatches for a few hours I can expect to find a few of these guys in my boat. This is the biggest one I have seen, its egg sac was close to as big as a quarter. Anyhow they look dangerous.

http://www.calfishing.com/dc/user_files/3844-78078spin.jpg

Hey let that Bass go I wanna catch her some day
http://www.calfishing.com/gallery/v/members/tmcustoms/

Attachment #1, (.jpg file)