1. Digital creation. A simplified picture of how a goldfish might see the world. The bending of light by water and glass is calculated; colour vision is not. Visitors are Rocketbox avatars (Microsoft, MIT licence); the TV programme and all sound are generated.
2. Motion sickness. A moving, bent view in VR can cause dizziness or nausea. Stay seated or in a clear space, take breaks, and stop if you feel unwell. Not advised for children without supervision, during pregnancy, or with conditions affected by motion.