Born in Arta, Greece, in 1916, Moralis moved to Athens with his parents in 1927. From the age of 15 he studied at the Athens School of Fine Arts under Umbertos Argyros and Konstantin Parthenis. In 1936 he received a grant from this school to study for a year in Rome. After this, he went to Paris to study fresco and mural work at the École Nationale Supérieure des Beaux-Arts in Paris. He also studied mosaic at the École des Arts et Métiers.
When the Second World War broke out in 1939, Moralis returned to Greece. The first exhibition of one of his works was in 1940; numerous other exhibitions followed both nationally and internationally.
From 1947 Moralis taught at the Athens School of Fine Arts until his retirement in 1983. In 1949 he formed, with other artists – including Nikos Hadjikyriakos-Ghikas, Yannis Tsarouchis, Nikos Nikolaou, Nikos Engonopoulos and Panayiotis Tetsis – the “Armos” art group. This group had its first exhibition in 1950 in Athens’ Zappeion.
From the 1970s on, he moved from realistic depictions of the human form of his earlier works towards a geometric stylisation incorporating curves.
Over the years, Moralis was also involved with illustrating poetic works by Odysseas Elytis and Giorgos Seferis; and decorating architectural works such as the façade of the Athens Hilton, the Metro-Station “Panepistimiou” and the Athens Central Station.
Moralis died on December 20, 2009 in Athens.
His works are i.a. part of the Cangelaris Collection of Contemporary Greek Painting, The Stavros Niarchos Foundation Cultural Center (SNFCC), National Gallery Alexandros Soutzos Museum, Benaki Museum Athens, Vorres Museum, PAC Austria, Artforum Collection,The Metropolitan Museum of Art NYC.