Ichthyas ( Greek: Ἰχθύας; fl. 4th-century BCE), the son of Metallus, was a Greek philosopher and a disciple and successor of Euclid of Megara in the Megarian school. [1] He was a colleague of Thrasymachus of Corinth in the school. [2] Ichthyas is described as a man of great eminence, and Diogenes of Sinope is said to have addressed a dialogue to him. [3]
According to Hilarius Emonds, [4] correcting a previously misread passage in Tertullian's Apologeticus, Ichthyas was a leader in the oligarchic revolt in Megara in 375 BCE. [5]