My Pet Dragon(2025)

Original title: Горыныч

Senior Lieutenant of the Navy Aleksey Alekhin, once descending to the seabed in a bathyscaphe, finds himself in a strange underwater cave that serves as a portal to a fabulous world. In this new unfamiliar place, he meets a little dragon left without a mother. Aleksey unwittingly becomes the dragon's guardian and friend and gives the baby the name Gorynych.