Shellsquid

From DALpedia

A very strange creature, they are usually about 5'5" high, 5'7" long and 3'4" wide.

They appear as a squid like creature in a shell. They are only found in the deepest depth of the sea, and are very rare. They have been known to be able to live on land for several hours, before showing any negative effects.

The shellsquid has been known to be quite an intelligent creature, with the same intelligence as an ogre, however they cannot speak.

The shellsquid was first seen when Marshall summoned it to help Ein build the Leviathan. Marshall obtained the essence of summoning this creature when he got his amulet. It is unknown how anyone could have obtained the essence of this creature, since they live in such a deep-water environment, that no person would be able to get that deep underwater without dieing, or having a machine and/or extreme magical abilities.

It's also a possibility that these creatures are not natural, and have been created by man.