While human ears are designed to detect sound, our fingertips introduce us to a sensory world where mechanical waves are “felt” as they travel through surfaces. Substrate-borne communication and sensing through vibration are, in fact, widespread across the animal kingdom. Fish behaviour frequently involves the production of sounds or visual signals (such as “trembling”) when they are in, on, or near substrates. Despite the likelihood of energy transfer between media (water-substrate), the extent to which vibrations travel through surfaces and their role in fish ecology remain largely unexplored. The vibrational landscape, or vibroscape, may be a crucial component of a fish’s perceptual world, overlapping with the soundscape. Our investigation will focus on whether fishes produce and respond to vibrational signals and cues, and how far these vibrations propagate through substrates. To achieve this, we will measure substrate vibrations (using acoustical oceanography and engineering methods), conduct playback experiments (integrating behaviour, bioacoustics, neurophysiology), and interpret our data through the lens of biotremology (vibrational communication). Our interdisciplinary team is well-positioned to uncover a new mode of communication in fish, and to reveal a previously uncharted sensory landscape in marine ecology, the underwater vibroscape.