Sawfish
Electrolocation

The rostrum (saw), unique among jawed fish, plays a significant role in both locating and capturing prey. The head and rostrum contain thousands of sensory organs, the ampullae of Lorenzini, that allow the sawfish to detect and monitor the movements of other organisms by measuring the electric fields they emit. Electroreception is found in all cartilaginous fishes and some bony fishes. In sawfish the sensory organs are packed most densely on the upper- and underside of the rostrum, varying in position and numbers depending on the species. Utilizing their saw as an extended sensing device, sawfish are able to examine their entire surroundings from a position close to the seafloor. It appears that sawfish can detect potential prey by electroreception from a distance of about 40 cm (16 in). Some waters where sawfish live are very murky, limiting the possibility of hunting by sight.
language:response_language[Latin], length_constraints:number_words[165], oulipo:avoid_letter[a]