Krakens

"'Okay, I don't mean to freak anyone out, but I'm pretty sure that's a kraken.' -Keefe, Everblaze"The kraken is a huge green aquatic beast mentioned in Everblaze. They look like a mix of an octopus, an elephant, and a lion. These creatures have six fangs, trunklike, tentacled noses, and slimy bodies.

Sophie, Keefe, and Sandor encountered a kraken when using light from unmapped stars to test the Black Swan's security.