In the vast and colorful—and sometimes terrifying—world of marine life, few creatures are as captivating as the Costasiella kuroshimae. Affectionately known as the "leaf sheep" or the "Shaun-the-sheep ...

With ear-like fins that flap gracefully through the water, the Dumbo octopus in this YouTube video looks like it waltzed straight out of an animation studio. But don't let their cute facade fool you; ...

With how huge the world is, it is impossible that they have all been discovered at this point, especially when considering ...