Blue shark, Prionace glauca.
As with many photographers, my images are available to license on a Rights Managed basis (and some Royalty Free) through several online stock libraries. Currently I mostly supply images to Alamy. You can directly access and license my Alamy Images using the link below.
Adding images to stock libraries, as any photographer will tell you, is a very time consuming process. So of course the vast majority of my images reside on personal hard drives rather than online. So if you can't find the image you are looking for, feel free to email me, using the contact form, and ask. It may well be something I simply haven't found time to upload.