Cryptozoology is such a load of bull poop.
The funny thing is that its adherents tend to focus on gigantic creatures, when it's precisely something small that would be more likely to have escaped our attention. Yes, new species are being discovered all the time, but they're usually quite small or look very similar to something we already know about.
When I worked at an Aquarium in California, people loved to ask about the Megalodon shark (~50ft long), and whether there might still be some alive lurking in the deep ocean somewhere. However, the fossilized teeth not only show this creature to have been extinct for millions of years, but also that it was a warm/shallow-water shark primarily distributed along the coastline.
