The bill does have powerful sensors in it, but they are tactile, not electrical. They are agile enough in the water (both hind feet and the tail are rudders) that a close shave allows them to sense an object and dodge it, in most cases, even in the murkiest water.F5 said:I heard somewhere that the platypus' bill has powerful electrical sensors in it, that it uses to "feel" its' way around obstacles underwater, since it swims with its' eyes closed. You could give it underwater Blindsight.
Or I could just be unknowingly making stuff up again...

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.