NERVUS TERMINALIS PROJECTION TO THE RETINA IN THE 4-EYED FISH, ANABLEPS-ANABLEPS

The eye of the surface dwelling 'four-eyed' fish, Anableps possesses a n aquatic and an aerial optical system. The aerial system is strongly hyperopic when the animal dives, i.e. during mating, and the dorsal pu pil is submerged. We studied the retino-petal nervus terminals project ion to the aerial and to the aquatic retina by Phe-Met-Arg-Phe-NH2 (FM RF) immunocytochemistry and found both to be equally innervated. This finding sheds doubt on the proposed functional significance of this pr ojection for reproductive behaviour.