As for determining which animals have been strangled and not drained of their blood, we must understand that the focus was on the quantity of blood remaining in the meat of the animal. It was not the fact that the animal was strangled that kept it from being eaten, but the fact that it was never drained of its blood.
The Eocene constitutes the middle part of the Paleogene period (65-23 million years ago), preceded by the Paleocene and succeeded by the Oligocene epoch (34-23 million years ago); all of these periods and epochs were part of the Cenozoic Era (65 million years ago to the present).
Fish Fossils. TRIASSIC to PLEISTOCENE PERIOD: 230 million to 10,000 years ago. The oceans are believed to be more than 4 billion years old. They were home to the very first known form of life on our planet 3.5 million years ago, blue-green algae.