There are a lot of fish in the sea, and one man wants to get to know all of them, inside and out. University of Washington biologist Adam Summers is on a mission to scan all 33,000 known species of fish. Summers and his team use a CT scanner to create highly detailed images of fish skeletons. CT scanners take multiple X-ray images and use computers to stitch them together.

These stunning images, which are available free online, reveal the internal structure of fish. To see the fish skeleton the team has already scanned in extreme detail, anyone can visit the website at https://osf.io/ecmz4/wiki/Fishes.