For many Americans, mid-summer is best spent by the shore; beaches and lakes are traditionally packed this time of year. And if you’re lucky, that little time by the water will involve a glimpse at some aquatic life — a sand crab, a sea star, perhaps a fish or two. If your summer sightings have inspired an interest in fish (or perhaps you want to save yourself the sunscreen and view some wildlife from the comfort of your computer screen), one of our favorite sources of undersea imagery is the ichthyology work of Marcus Elieser Bloch (1723-1799).