150 million years ago, a winged pterosaur called Rhamphorhynchus swooped low over sea to ctach a fish near the surface of a Jurassic ocean. But then a much larger fish - Aspidorhynchus - grabbed the pterosaur and pulled it under the waves. A fish within a pterosaur within a fish. Amazing.
Source: Frey, E. and Tischlinger, H. (2012) The Late Jurassic Pterosaur Rhamphorhynchus, a Frequent Victim of the Ganoid Fish Aspidorhynchus? PLoS ONE 7(3): e31945. doi:10.1371/journal.pone.0031945