This section is from "The American Cyclopaedia", by George Ripley And Charles A. Dana. Also available from Amazon: The New American Cyclopędia. 16 volumes complete..
Glaucus ,.I. Of Potniae, the grandson of AEolus, son of Sisyphus and Merope, and father of Bellerophon. To make his mares more swift and fierce, he prevented them from breeding, and, according to some, fed them upon human flesh. This incensed the gods, and especially Aphrodite; and when Glaucus took part with his chariot and horses in the funeral games of Pelias at Iolcus, the horses in madness upset the chariot, and, according to some, tore Glaucus to pieces. He was afterward believed to haunt the isthmus of Corinth, and to frighten horses engaged in the race. One of the lost tragedies of AEschylus was named from him. II. Of Anthedon in Boeotia, a fisherman who ate of the divine herb planted by Saturn, and became immortal. He built the ship Argo, and was her steersman. In the sea fight against the Tyrrhenians, he alone was unhurt; he leaped overboard, sank to the bottom, and became a sea divinity. He was said to visit the coast of Greece annually, and was revered by fisherman and sailors. His many loves were a favorite subject with poets. Aristotle says that he delivered oracles at Delos, which by some were more esteemed than those of Apollo. Philistratus describes a statue of him, half man and half fish.
He was often represented on the stage by the Greek dramatists.