This is fishing in the 54th century, I guess, or "Tremors" on another planet, or some combination of the two.
It's very "sci-fi," very futuristic as we see a big, macho guy in his fancy rig on some desolate, rock-filled planet do his version of "fishing." He hooks the big one and it takes he and his pet dog-like creature on one wild ride along the rocky surface. When the "fish," finally emerges from the underground, you'll know what I mean about the reference to the film "Tremors."
There are no laughs in this animated short, but the graphics are excellent and it keeps you riveted to the screen for the full nine minutes. This is fishing like you've never seen it!
P.S. I didn't quite understand the ending but I don't think the story is going to capture most viewers, anyway, just the art and the action-packed sequences which will keep you wondering what exactly is beneath the earth that is so strong! Lovers of science fiction (and pets) should enjoy this.