How big do blue sharks get? My dad told me a story about a one of his friends hooked at La Push back in the 70s. He estimated it at 14 feet long (said it was only a couple feet shorter than their 16 foot boat) and was dark color. It was down eating the bottomfish they were hooking before it surfaced and took a big herring. They way dad described it made me think it would be too big for a blue.