Any underwater drones small enough to fit in aquarium?

OpenROV Conducting Crowdfunding Campaign For Newest Underwater Drone

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Monterey Bay Aquarium Research Institute (MBARI) Using Underwater Drones to Study the Ocean - Drone Videos & Photos

Any underwater drones small enough to fit in aquarium?

Avelo scuba system moves buoyancy control into a high-tech air tank

PowerVision Powerray Explorer Underwater Drone for Exploration, Diving, and Boating - High Definition Camera, Equipped with 4K Ultra HD Video Camera, Remote Control, and Live Stream Capability : Electronics