Watch Arlo the Alligator Boy (2021) HD Full Movie Free on SolarMovie. Watch Arlo the Alligator Boy (2021) online free. A young humanoid alligator travels to the big city in hopes of reuniting with his estranged father, ...A young humanoid alligator travels to the big city in hopes of reuniting with his estranged father, meeting a colorful cast of characters along the way.