This Deep-Sea Fish Has the Most Types of Opsins Among Vertebrates

The silver spinyfin has an extraordinary diversity of rod photopigments, which researchers propose may allow it to see color in the deep, dark sea.

Deep-sea fish eyes are not freaky by accident - Queensland Brain Institute - University of Queensland

Deep-sea fish - Wikipedia

Dynamic light filtering over dermal opsin as a sensory feedback system in fish color change

Green‐shifting of SWS2A opsin sensitivity and loss of function of RH2‐A opsin in flounders, genus Verasper - Kasagi - 2018 - Ecology and Evolution - Wiley Online Library

3. Aphakic gaps in the eyes of deep-sea fishes. (A) A rostral aphakic

From blind amoeba to Nemo: the evolution of fish (and vertebrate) vision – The Applied Ecologist

Non-visual Opsins and Novel Photo-Detectors in the Vertebrate Inner Retina Mediate Light Responses Within the Blue Spectrum Region

New type of highly sensitive vision discovered in deep-sea fish - Innovations Report

Some deep-sea fish have evolved souped-up colour night vision

The evolutionary history and spectral tuning of vertebrate visual opsins - ScienceDirect

Evolution of Animal Color Vision

The blue-green world of deep-sea fish - iForum

The phylogenetic relationships between the vertebrate visual opsin