The Indonesian Mimic Octopus is relatively new on the nature scene, not getting discovered until 1998 and all.
It may not be as big as the giant frozen super squid, but it has its own charms.
The creature is an incredible impersonator and can distinguish which predator to mimic depending on the sea beast that is bugging it.
In the video, note the sudden color change during the battle with the crab. The quote below is posted with the video on youtube.
The Indonesian Mimic Octopus, Thaumoctopus mimicus. This fascinating creature was discovered in 1998 off the coast of Sulawesi in Indonesia, the mimic octopus is the first known species to take on the characteristics of multiple species. This octopus is able to copy the physical likeness and movement of more than fifteen different species, including sea snakes, lionfish, flatfish, brittle stars, giant crabs, sea shells, stingrays, jellyfish, sea anemones, and mantis shrimp. This animal is so intelligent that it is able to discern which dangerous sea creature to impersonate that will present the greatest threat to its current possible predator. For example, scientists observed that when the octopus was attacked by territorial damselfishes, it mimicked the banded sea snake, a known predator of damselfishes.
I could watch this over and over – or at least 8 times, once for each leg.