Is Cyclops poseidon's son?

Once I asked my teacher if Cyclops is Poseidon's son,and she said that Cyclops is poseidon's son,and I needed to search on the Internet,and saw an article saying "Cyclops,for a gift,he gave a trident to his BROTHER, Poseidon," and I got confused and researched if Cyclops really is the son of Poseidon, and some articles said no,and some said "Not sure" PLS. HELP!!