Carcinus was an Ancient Greek tragedian, and was a member of a family including Xenocles (a father or uncle) and his grandfather Carcinus of Agrigentum. He received a prize for only one out of his one hundred and sixty plays, many of them composed at the court of Dionysius II of Syracuse. He and his sons were lampooned by Aristophanes at the end of The Wasps and in Peace.
All three of those sons became playwrights.
In Aristotle's Poetics, Chapter 17 (1455a lines 22 to 29), he discusses the necessity for a playwright to see the composition on the stage, rather than just in print, in order to weed out any inconsistencies. For an example, Aristotle makes reference to an unknown play of Carcinus which had a character, Amphiaraus, come out of a temple. For some reason (presumably the events prior), this seemed outrageously inconsistent when viewed on the stage, and the audience "hissed" the actors right off the stage. Apparently, this particular inconsistency was not easily recognized by merely reading the script.