Help me choose
A stronger Pool Express option
Dolphin Nautilus CC and Dolphin Proteus DX4 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Nautilus
Dolphin Nautilus CC
Inground and above-ground pools up to 33 ft that need floor and wall cleaning.
Proteus
Dolphin Proteus DX4
Inground pools that need floor, wall and waterline cleaning.
What we recommend instead
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumDolphin Nautilus CC or Dolphin Proteus DX4: our take
Dolphin Nautilus CC and Dolphin Proteus DX4 are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.
Pool fit and cleaning reach
Dolphin Nautilus CC is intended for inground and above-ground pools, while Dolphin Proteus DX4 is intended for inground pools. Dolphin Nautilus CC has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. Dolphin Nautilus CC cleans floor and walls; Dolphin Proteus DX4 cleans floor, walls, and waterline. Dolphin Nautilus CC's documented cleaning system includes 1 active brush.
Filtration and debris
Both models include Basket.
Controls and day-to-day ownership
Dolphin Nautilus CC provides one-touch starts and power-supply controls; Dolphin Proteus DX4 provides a weekly timer and power-supply controls. Dolphin Nautilus CC uses a 50 ft corded cable, while Dolphin Proteus DX4 uses a 60 ft corded cable with an anti-tangle swivel.
Price, warranty and the decision
Dolphin Nautilus CC is listed at $699 and Dolphin Proteus DX4 at $1,199; Dolphin Nautilus CC is $500 less. Each lists a 2-year manufacturer warranty. Dolphin Nautilus CC and Dolphin Proteus DX4 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Feature check: what each robot actually has
A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.
| Feature | Dolphin Nautilus CC | Dolphin Proteus DX4 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | No | YesEdge |
| Smartphone app | No | No |
| Anti-tangle swivel | No | YesEdge |
| 3-year warranty | No | No |
| No recharging between cycles | Yes | Yes |
| Built-in UV-C water treatment | No | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Dolphin Nautilus CC stands out
Dolphin Nautilus CC is the better fit for shoppers prioritizing the lower $699 starting price.
- Is listed $500 lower
- Cleans floor and walls
Where Dolphin Proteus DX4 stands out
Dolphin Proteus DX4 is the better fit for inground pools that need floor, wall and waterline cleaning.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Can start on a weekly schedule without a manual launch before every cycle
- Uses an anti-tangle swivel cable
Dolphin Nautilus CC vs Dolphin Proteus DX4 specifications
Use pool fit first. Price and app control do not make up for a robot that cannot cover the length or surfaces you need cleaned.
| Specification | Dolphin Nautilus CC | Dolphin Proteus DX4 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor and wall cleaning. | Inground pools that need floor, wall and waterline cleaning. |
| Starting price | $699 | $1,199 |
| Pool type | Inground, Above-ground | Inground |
| Maximum pool length | Up to 33 ft | Not listed |
| Cleaning coverage | Floor, Walls | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Basket | Basket |
| Scheduling | One-touch start | Weekly schedule |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 50 ft | 60 ft with anti-tangle swivel |
| Robot weight | Not listed | Not listed |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Dolphin Nautilus CC and Dolphin Proteus DX4 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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