Sharks as ancient as the ocean, as powerful blood tide, so primitive, so silent, they appear when they are not called and they flood like lighting.
by Tim M Hol
Scientists believe that Sharks come into existence 400 million years ago. 200 million years before the dinosaurs. They are so ancient, a sub-acuatica, like the Chinese force of nature that balances everything.
By the way I made an app for fish identification