The specimen pictured above, described in the latest Journal of Fish Biology, has two heads side-by-side, each with its own gills, mouth, and teeth, fused onto a single body. The fisherman  who caught it,  kept the fetus for further study, and released the remaining shark offspring, which were able to swim away. ‘They’re hardy little critters,’ the paper’s coauthor Dr. Michael Wagner, assistant professor at Michigan State University department of fisheries and wildlife, told The Register. ‘But despite this, the two-headed specimen probably would have died after birth. Read more about the freakish catch here.