At https://phys.org/news/2020-08-ancient-giants-small-oddbal-australia.html … Little and Large were a UK comedy duo. Very often corny, but amusing as far as family audiences are concerned. In this link we have a story from The Conversation about big beasts and smaller animals. The idea that every creature in the Late Pleistocene was bigger than modern examples is a popular perception. In reality a lot of small animals co-existed with the big ones. The same might be said of the dinosaurs. They weren't all lumbering great beasts. Some of them were quit diminutive. In Australia the big ones are known as megafauna and include such things as giant kangaroos and giant wombats etc. These appear to have died out at the end of the last Ice Age – reasons unknown but humans have of course been blamed as options are limited for mainstream. In this story we have seals that were the size of European harbour seals. These are commonly seen bobbing their heads in and out of the water at Cornish fishing villages, for example. The Australian seals were related to leopard and elephants seals, big beasts of the modern Southern Ocean which circles Antarctica. The fossil seals date back to the Miocene rather than the Late Pleistocene, which is a peculiarity in the story. Most animals began small and evolved into bigger forms.
… the fossils were discovered in rocks from a falling cliff near Melbourne and are said to date back 5 million years ago.