The clouded leopard is one big cat that definitely deserves more attention. Their fur markings are absolutely beautiful. They may not be endangered, but unfortunately, they are listed as Vulnerable.
For that matter, the snow leopard. Top of the food chain in one of the most extreme environments on Earth: the Himalayas. And for that matter, all other leopards, from the common African leopard—it drags its food up into a tree so scavengers won't bother it!—to the critically-endangered Amur leopard.
The mimic octopus is one cool cephalopod! First of all, its appearance is very striking, with an amazing white-and-brown stripe pattern. Second, the "mimic" in its name is well deserved - It can imitate many different animals, such as stingrays and sea snakes, to fool predators!
Speaking of sea creatures, let's not forget the sunflower star. This is a powerful juggernaut among starfish, a monster that can grow up to 1 meter in diameter and have up to 20 arms! It feasts on brittle stars, and you have to admit, it looks awesome watching large groups of the things all fleeing once a sunflower star shows up.