Shay Lamden (Earth-2)

A "man-shark", as described by Patty Spivot, is a meta-human with the physical characteristics of a human and a shark.

Biography
Man-shark was brought to Earth-1 by Zoom to kill the Flash. When the Flash watched Patty Spivot from a distance, the man-shark grabbed him and told him that Zoom wanted him dead. Shortly after, Patty walked out and man-shark was shot by her several times, though the bullets ricocheted off him. As he approached Patty, he was shot by Harrison Wells with a blast of energy.

Powers

 * Shark physiology: Due to unknown means, the man has the physical characteristics of part-human, part-shark.

Trivia
Before the tweet was removed, Hayter said that this was King Shark, likely the Earth-2 version. Grant Gustin later tweeted about the Special Effects work done on this creature using the hashtag "KingShark"