Coelophysis is a fanboy who began posting on the Topix Dinosaur Forum as a guest in Summer 2012 and posted semi-frequently on the Topix Dinosaur Forum until late 2014. His arrival was triggered by JMD, who extended him an invitation on another forum called Dinosaur Home.

Coelophysis' posts are often plagued with misinformation and inaccurate statements. For example, he insisted that birds were not dinosaurs, but rather crocodilians. Because of this, many users, including Pinky And Ze Brain, Edaphosaurus, Lord of the Allosaurs, and Paleoworld-101, denounced him as a fanboy of John Ruben (A highly controversial paleontologist)

He is considered intolerable to most people on the Topix Dinosaur Forum, and his posts often pollute threads with false information and poor grammar. His most virulent phase of posting came shortly after his arrival in 2012, and afterwards his activity became less and less frequent. He popped up infrequently throughout 2013 and 2014, although he was usually ignored by other users because of his baseless, unscientific views. By late 2014, he had ceased posting altogether.

Coelophysis returned at some point and still spreads his controversial views, now battling Migatte, Vipersocal, and Dinosaurine. The latter three often call out his grammar, with the latter even saying that Coelophysis's grammar and statements give him a migiraine. Dinosaurine left the forum shortly and now Migatte and Vipersocal are pushed back from Coelophysis's stubbornness.