<human>:  Is immersion in virtual reality testable on cnidarians before humans?
<bot>: No, immersion in virtual reality is not testable on cnidarians before humans. Cnidarians are a type of animal that has no brain. Q Perceptions are interpreted in the brain via the nervous system. Hypothetical ways of interfacing with the central nervous system are being explored for immersive virtual reality. Cnidarians have a nervous system, but not a brain.