Only a small fraction of life makes it into the fossil record. Most living organisms simply disappear without a trace. Diplomystus is an extinct genus of freshwater clupeomorph fish distantly related to modern-day extant herrings, alewives, and sardines. Priscacara is an extinct genus of perch from the middle Eocene, characterized by a sunfish-like body and stout dorsal and anal spines. Mass deaths of Priscacara suggest it formed schools. A small schooling fish, Knightia made an abundant food source for larger Eocene predators. This striking piece of natural history contains a 10.5″ Diplomystus, 5.25″ Priscacara and 3.25″ Knightia.