Creating a hovercraft that appears full of eels involves a combination of efficiency and design inspiration. Here's a structured approach:

1. **Hybrid Design**: The hovercraft should incorporate elements reminiscent of eels, such as sharp teeth, strong gills, and gill-like structures. These features can be achieved through wire or flexible materials to mimic eel-like aesthetics.

2. **Propeller Adaptation**: The propeller could feature a design inspired by an eel's cross-section or structure. This might include curved shapes or patterns that resemble eels' gills spread across its length, aiding in lift and stability.

3. **Environmental Integration**: If the hovercraft is part of a marine ecosystem, it could integrate with an "eel" community within its environment, enhancing both functionality and appearance through unique design elements.

4. **Material Use**: Using lightweight, flexible materials like wire or plastic to create eel-like features in parts such as propellers or other components. This would make the hovercraft both functional and visually engaging without being impractical for hover operation.

5. **Visual Enhancements**: Incorporating designs that subtly hint at eel-like structures within sections of the hovercraft, possibly by altering propeller sections to include these features, making it more recognizable as an "eels" hovercraft.

6. **Aesthetic Appeal**: The overall design should look interesting and dynamic, using wire or other flexible materials to create a sense of movement and efficiency typical of hovercrafts.

In summary, the hovercraft would blend hovercar principles with eel-inspired designs, enhancing both functionality and visual appeal through unique, innovative features.