User blog comment:Jamintheinfinite/Subnautica Creature Evolution/@comment-35546951-20181012164522/@comment-26434953-20181012183608

The databank for the Gargantuan skeleton says it's an eel, but given that it's three million years old there's no clear indication of whether it's related or is another species entirely. The Shuttlebug and Eyeye also having one eye does not mean they're related.