Paige: our character's storyline is based on their species having Light embedded in their body somehow - because they live in nice darkness. The Krad want to destroy the inhabitants so there is always eternal darkness.
The Smooch Fish, a recently discovered creature in the deepest part of the deepest part of the ocean (deep squared!) and can now be seen in a fantastic book called The Deep—The Extraordinary Creatures of the Abyss by Claire Nouvian
If you thought that dragons can't be found in the sea, you were wrong. A fascinating creature called the sea dragon can only be found in the waters off the coast of Australia but is by no means a deadly menace.