Orion can traverse water. He in amphibious. He is humanoid. He can see invisible creatures. Orion is an omnivore.

Orion was the son of Neptune. He was a handsome giant and a mighty hunter. His father gave him the power of wading through the depths of the sea, or, as others say, of walking on its surface. He dwelt as a hunter with Diana (Artemis), with whom he was a favourite, and it is even said she was about to marry him. Her brother was highly displeased and often chid her, but to no purpose. One day, observing Orion wading through the sea with his head just above the water, Apollo pointed it out to his sister and maintained that she could not hit that black thing on the sea. The archer-goddess discharged a shaft with fatal aim. The waves rolled the dead body of Orion to the land, and bewailing her fatal error with many tears, Diana placed him among the stars, where he appears as a giant, with a girdle, sword, lion's skin, and club. Sirius, his dog, follows him, and the Pleiads fly before him.
Bulfinch's Mythology, by Thomas Bulfinch