Ok Let me correct this first post
The statue on the right most definitely is Poseidon. However the one on the left is Triton and NOT Sagittarius. Better camera angles made that clear.
from wiki – "Triton (/ˈtraɪtən/; Greek: Τρίτων Tritōn) is a mythological Greek god, the messenger of the sea. He is the son of Poseidon and Amphitrite, god and goddess of the sea respectively, and is herald for his father. He is usually represented as a merman which has the upper body of a human and the tail, soft dorsal fin, spiny dorsal fin, anal fin, pelvic fins and caudal fin of a fish, "sea-hued", according to Ovid[1] "his shoulders barnacled with sea-shells".
Like his father, Poseidon, he carried a trident. However, Triton's special attribute was a twisted conch shell, on which he blew like a trumpet to calm or raise the waves. Its sound was such a cacophony, that when loudly blown, it put the giants to flight, who imagined it to be the roar of a dark wild beast.[2]."