This course features a series of jumps, tight turns, and underwater tunnels with its own accelerator on the path. It is also obstructed by robotic crabs and piranha (possibly Crabmeat and Chopper).
Much of the course is spent inside tubing. Although the player may not see it, these tubes loop back on themselves all over the track that the racers already traversed (or will traverse) below. Because of this, certain weapons won't work. The heat-seeking missile, for example, tends to break against the side of the tubing before finding its intended target. When the racers burst forth from the tubing, it can look like the player is supposed to steer his/her kart toward the right as you sail through the air. However, the actual goal is a distant rock cave, which the player will easily reach if he/she were going fast enough before leaving the tube (thanks to some boost pads).
For Seaside Hill-located tracks, such as Ocean Ruin, these are the following tracks selectable for the course: