Aloidae, in classical mythology, the gigantic sons of Neptune by the wife of Aloeus. Their names were Otus and Ephialtes. At the age of 9 their bodies measured 9 cubits in breadth and 27 in height, and they alarmed the gods by waging war on Olympus and piling Pelion upon Ossa. They put Mars in chains and kept him so 13 months. Before their beards began to grow Apollo destroyed them.