Of the senses we're familiar with or aware of, anyway, e.g. taste/smell/hearing/vision/touch.
Our eyes are not ideal for living in air. They're fish eyes that adapted over and over so they work well-enough in the air. I want to know what a purpose built air eye would be like.
I wonder how they would differ? Maybe more like a camera? Though that is pretty similar to ours.
If they were air filled, which would the best for refraction/distortion avoidance, how would the air get in there? Eye vents would be problematic when swimming.
Mantis shrimp can see waaaaaay more colors than we can. I want to see those colors.
always thought it'd be really neat to be able to smell as well as dogs do.
I want to see magnetic fields, similar to pigeons and other migrating birds. Or colours beyond the visible spectrum.
