Megalodon Evolution: It’s crazy to see how the shark developed and evolved over millions of years. The shark just kept getting bigger and bigger as it ate larger and larger prey like whales, dolphins, other sharks, etc. Some experience shark tooth collectors will notice some out-dated scientific names here, this chart is from Dr. Gordon Hubbell’s private shark tooth collection and was made many years ago. This was only a very small part from what is considered the best fossil shark tooth collect