THE IKHTHYOKENTAUROI (Ichthyocentaurs) were a pair of centaurine sea-gods with the upper bodies of men, the lower fore-quarters of horses, and the serpentine tails of fish. Their brows were crowned with a pair of lobster-claw horns.
The fish-centaurs were named Bythos (Sea-Depths) and Aphros (Sea-Foam). They were brothers of the wise kentauros Kheiron (centaur Chiron) and like him were perhaps regarded as wise teachers.
The sea-centaurs were probably derived from the Fish-Deities of Syrian mythology which carried Ashtarte ashore after her birth. These were placed amongst the stars as the constellation Pisces.
A pair of twin lesser-known Greek sea gods named Bythos (Sea-Depths) and Aphros (Sea-Foam) were depicted as ichthyocentaurs. They were half-brothers of Chiron and the sons of Poseidon and the sea goddess Amphitrite.
The twin ichthyocentaurs appear together in several works of art. The mosaic above (Z10.1) from Zeugma, depicting the birth of Aphrodite, is inscribed with the names of the two who are lifting the goddess' cockle-shell out of the sea. Aphros was perhaps regarded as her foster-father, given their similarity in names. The two sea-gods also appear in a pair of matching sculptures (belonging to the Louvre and Vatican Museums) depicting them carrying Seilen companions of the god Dionysos, after his company was driven into the sea by the Thrakian king Lykourgos.
Origin
The Sea-Centaurs were probably derived from the divine Fish of Syrian mythology which carried Ashtarte ashore following her watery-birth. These were set amongst the stars as the Constellation Pisces.