Ichthyas ( el, Ἰχθύας; fl. 4th-century BCE), the son of Metallus, was a

Greek philosopher Ancient Greek philosophy arose in the 6th century BC, marking the end of the Greek Dark Ages. Greek philosophy continued throughout the Hellenistic period and the period in which Greece and most Greek-inhabited lands were part of the Roman Empire ...

and a disciple and successor of

Euclid of Megara Euclid of Megara (; grc-gre, Εὐκλείδης ; c. 435 – c. 365 BC) was a Greek Socratic philosopher who founded the Megarian school of philosophy. He was a pupil of Socrates in the late 5th century BC, and was present at his death. He he ...

in the

Megarian school The Megarian school of philosophy, which flourished in the 4th century BC, was founded by Euclides of Megara, one of the pupils of Socrates. Its ethical teachings were derived from Socrates, recognizing a single good, which was apparently combined ...

. He was a colleague of

Thrasymachus of Corinth Thrasymachus ( el, Θρασύμαχος; fl. 4th century BCE) of Corinth, was a philosopher of the Megarian school. Little is known about him except that he was colleague and friend of Ichthyas, Diogenes Laërtius, ii. 113 and he had presumably bee ...

in the school. Ichthyas is described as a man of great eminence, and

Diogenes of Sinope Diogenes ( ; grc, Διογένης, Diogénēs ), also known as Diogenes the Cynic (, ) or Diogenes of Sinope, was a Greek philosopher and one of the founders of Cynicism (philosophy). He was born in Sinope, an Ionian colony on the Black Sea ...

is said to have addressed a dialogue to him. According to Hilarius Emonds, correcting a previously misread passage in

Tertullian Tertullian (; la, Quintus Septimius Florens Tertullianus; 155 AD – 220 AD) was a prolific early Christian author from Carthage in the Roman province of Africa. He was the first Christian author to produce an extensive corpus of L ...

's ''

Apologeticus ''Apologeticus'' ( la, Apologeticum or ''Apologeticus'') is a text attributed to Tertullian, consisting of apologetic and polemic. In this work Tertullian defends Christianity, demanding legal toleration and that Christians be treated as all other ...

'', Ichthyas was a leader in the oligarchic revolt in

Megara Megara (; el, Μέγαρα, ) is a historic town and a municipality in West Attica, Greece. It lies in the northern section of the Isthmus of Corinth opposite the island of Salamis Island, Salamis, which belonged to Megara in archaic times, befo ...

in 375 BCE.Tertullian, ''Apologeticum'', 46, 16: "et Ichthyas, dum civitati insidias disponit, occiditur."

Notes

{{Megarian philosophy 4th-century BC philosophers Classical Greek philosophers Megarian philosophers