Dolphin Embryo Microscopic Slides are scanned images of histological sections, captured using a digital camera connected to a microscope. The collection consists of many sections per single embryo. Each embryo is identified by a name, such as LACM 94674. Embryos were made available by the Los Angeles County Museum. A section number follows the name, e.g. LACM 94674-100 is section 100. The specimens are individuals of the Pantropical Spotted Dolphin (Stenella attenuata).

The goal behind these sections is to allow researchers and others to be able to see each section individually to study histological embryology as well as use a group of images to see changes within tissues.