Fated: Koi and the Osprey by Hawke Oakley

An alpha koi shifter snatched away…

Nishiki is a typical young alpha–except for the fact that he shifts into a koi fish, of all things, and that he didn’t awaken to his ability until he was a grown man. He barely knows anything about shifting or being an alpha, nevermind finding a mystical so-called ‘fated mate’ that his twin won’t stop prattling on about.
When Nishiki decides to accept his inner koi by diving into the deep end, everything goes horribly wrong. He’s hooked by a bird of prey right out of the water.
Just when Nishiki thinks he’s going to die, he realizes that bird is also a shifter–one who transforms into a gorgeous man who makes Nishiki’s heart skip a beat.
An omega osprey shifter who did the snatching.
Weston’s life is a double-edged blade. He’s a fierce lone wanderer–and according to every alpha he’s been with, way too confident for an omega. Without an alpha partner, he’s long given up on his greatest desire to have a baby.
To get his mind off his frustration, Weston hones his hunting skills. But when he captures a magnificent golden koi, the identity of the fish startles Weston.
Because he’s certain Nishiki is the alpha he’s been fated for all this time.