Medieval bestiaries were full of inaccurate depictions of animals. This was a result of world travelers who brought stories back to Europe of the amazing animals they encountered. Artists tried to recreate these animals from their descriptions, but were not all that successful. As it was, medieval artists always seemed to start with a dog and add features they were told about, at least for land animals. For sea creatures, they started with a fish and added what they were told.
But that's not all that's going on in this video. We also learn about some weird myths these exotic creatures became burdened with. Who knew you could distract a tiger mother with a mirror? Or that pelican babies ate their parents? (via Laughing Squid)