Ordovician Abnormalities

My brain seems to have taken a timewarp to somewhere in the Late Ordovician, Early Silurian periods. I'm oretty sure there's more prehistoric undersea scenes to come, likely with more random anachronistic impossibilities, like random mermen. I believe that the random merman and his eurypterid companion are hunting a monster anomalocaris, who may well be the subject of the next prehistory-inspired picture. Aside from the merman, the rest is mostly all actual things that lived at one time, crinoids and jawless fish species mainly, one of which I made up, the other two which I did not. The couple of tentacles in the foreground are supposed to be the aforementioned anomalocaris lurking in some sort of undersea cave-entranceish type place. Curse you, eurypterid in the news, it's your fault for reminding me all about eurypterids and thus all the other wonderful denizens of your aeon.

Prismacolor pencils on black textured paper.