Lights will be dimmed and sounds muted as The Maritime Aquarium at Norwalk presents a “Sensory-Friendly Evening” on July 18. The aquarium will re-open from 6:30 to 8:30 p.m. and offer activities designed for guests with sensory-processing differences. Plus, admission will be discounted, and an IMAX movie will be shown with reduced volume and the theater lights brighter than usual.