Submariner — Sea Life

The Dead-Reckoner Sawray glides along invisible current lines with a serrated snout held perfectly level, as if following a map no crew has earned. Its twin eyes rotate independently like wet compass dials, fixing on pressure shifts before the ship's gauges notice them. Navigation crews salvage the ray's directional cartilage because it twitches toward moving water, even after the rest of the beast has gone still.