Beautiful desktop micro-aquariums featuring ornamental fish that act as living early warning systems for environmental hazards in your home.
You sit down to work and notice your crystal-clear tank water has turned a soft amber hue. Your phone buzzes: "Carbon monoxide risk detected in your HVAC system — your Shadowfin just saved your morning coffee from becoming a medical emergency." The fish are happily swimming, completely unbothered, having done their job as nature's perfect early warning system.