Greek Heroic Age of the founding narratives of various city-states. They also became the ancestors of later heroes. The Phoenician prince Cadmus, was the first Greek hero. The grandson of Poseidon (through his father Agenor), he founded Thebes Perseus, famous for his exploits well before the days of his great-grandson, Heracles, was the son of Zeus. Perseus beheaded the Medusa, saved Andromeda from the sea monster Cetus, and was the legendary founder of Mycenae. Aeacus was also a son of Zeus. Bellerophon was descended from the nymph, Orseis. Oenomaus, king of Pisa, in the Peloponnese, was the son of Ares. The excellence of
Sea monster and caudal fins first, making them resemble a plesiosaur. Sea monsters actually reported first or second hand include Sea monster Sea monsters are beings from folklore believed to dwell in the sea and often imagined to be of immense size. Marine monsters can take many forms, including sea dragons, sea serpents, or multi-armed beasts. They can be slimy and scaly and are often pictured threatening ships or spouting jets of water. The definition of a "monster" is subjective, and some sea monsters may have been based on scientifically accepted creatures such as whales and types of giant and colossal squid.