Fish fingers

Meet Elpistostege watsoni - or at least what it might looked like. All we have left - a bunch of petrified bones. Including smaller fin bones which gave us - and all tetrapods, e.g. turtles, lizards, dinosaurs, bats, birds, elephants, whales and your chonky corgys (also - you) - fingers.

This one is from Miguasha, Canada: https://miguasha.ca/mig-en/index.php

These beauties had a holes in the back of their heads (spiracles). Some modern fish has spiracles too and use them to BREATHE AIR. So Elpistostege might have used his front fins to prop up its body to hold the head above the water surface.

Half of bearded banana for scale.

A map for bones.

https://www.scientificamerican.com/article/how-a-380-million-year-old-fish-gave-us-fingers/ More info