Anableps, the four-eyed fish, enters the LRT

Another oddball fish today
and a short report on it.

Anableps tetrophthalmus (Scopoli 1777; Anableps anableps Linneaus 1758; 32 cm max length) is the extant four-eyed fish, a slow-moving surface predator with eyes often exposed above the surface of slow-moving fresh and brackish waters where they seek nearby insects. The eyes have divided or dual pupils, one for aerial vision and one for the denser medium of aqueous vision. A close relative of the flying fish, which also is found near the surface and has large eyes.

Anableps brings to mind
the vision issue facing other fish that sometimes expose their face to the air, like the mudskipper and our pre-tetrapod ancestors among the lobe fin fish.

References
Linnaeus C 1758. Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata.
Scopoli GA 1777. Introductio ad historiam naturalem sistens genera lapidum, plantarum, et animalium. Wolfgang Gerle, Pragae 3-506.

wiki/Four-eyed_fish