Yes. Poseidon presented Demeter with several horses to impress her.
horse
Arion was a horse born from the union of Poseiden and Demeter.
The creature created by Poseidon for Demeter was the horse. Poseidon struck the ground with his trident, creating the first horse to appease Demeter after she had been mourning the loss of her daughter, Persephone.
Demeter is both sister and lover to Poseidon, together they had Despoine, a mystery goddess; and Areion, a immortal horse.
AREION (or Arion) was an immortal horse born to the goddess Demeter after she was raped by Poseidon in the shape of a horse. He was first owned by the Arkadian Ogkios, then by Herakles and finally by Adrastos.
Demeter was half-sister of the centaur Chiron by her father Cronus's affair with Philyra. Demeter, with Poseidon had a son who had the form of a horse his name was Arion.
A legendary horse, an off-spring of Poseidon and Demeter.
Poseidon made her the first horse to impress her.
Poseidon gave Demeter a magnificent white horse named Arion as a gift to win her love.
To impress Demeter since Demeter asked him to create the most beautiful animal, so that she would start liking him. But after a lot of mistakes(zebra, giraffe, camel) Poseidon finally made the horse but he no longer liked Demeter anymore.
In Greek Mythology, Arion is an immortal horse born to Demeter and Poseidon who was in the shape of a horse during their "contact". He was first owned by the Arkadian Ogkios, then by Herakles and finally by Adrastos.
Yes Poseidon is the brother and lover of Demeter, their parents are Rhea and Cronus and thier children are Despoine, a mystery goddess and Areion, a immortal horse.