Beautiful squid vs whale from top and bottom.
Weird, beautiful, impractical. Also, a little bird-like.
From the source:
Pteraspis is an extinct genus of primitive jawless fish that lived in the Devonian period. This fish is a typical of the pteraspid family of heterostracans, means an extinct jawless fish with the anterior part of its body covered with bony plates; which became very large in number and diverse during the Late Silurian and Early Devonian.
Pteraspis was a good and a powerful swimmer, bony outgrowths from the back of the head shield provides stability. Though Pteraspis lacked fins a large spine acted as a kind of dorsal fin and two rigid wings or keels functioned as pectoral hydrofoils.
The long flexible tail was hydrodynamic with the lower lobe elongated to provide lift at the front of the body during swimming.The elongated snout provide the additional lift, which was drawn out into a bladelike rostrum below which the mouth opened.
Heterostracans, the earliest of the ostracoderms, lacked paired fins which most modern-day fish possess and use for stability.
Roboctonaut is an astronaut, octopus and robotically enabled explorer.
Orcinus Assassinus Orca!
“Hard to imagine that, amongst the seemingly endless varieties of ammonite shell shapes in the fossil record, the Toxoceras was one of the more modest. This very early Cephalopod would have swam backwards, just as modern cuttlefish, squid, and octopus do today”