My poor browser often failed to reveal Sailor‘s nice shots, that’s why I said “you used to see” instead of “you see”!
“Poseidon is also capable of summoning the Kraken.”
You’re quite right. He who pays no respect to him get punished. Poseidon commands all sea monsters in his dispose. Giant octopus is just a form of the krakens and the one tourists see at the Piazza Navona Neptune fountain is a companion/attaché to Neptune. Simply like dolphins, seahorses, tritons and sealymphs.
A pair of sweet American sisters walked out for their camera after getting helped at the fountain
Piazza Navona is gorgeous and always congested with tourists. I spent times there every time I visited the city.