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.

Frontiers Benthic visual adaptation by fine-tuning light sensitivity in Japanese flounder (Paralichthys olivaceus)

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

Evolutionary Diversification of Visual Opsin Genes in Fish and Primates

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

Light environment drives evolution of color vision genes in butterflies and moths

Vision using multiple distinct rod opsins in deep-sea fishes

Opsin gene expression in larval and adult deep-sea fishes supports a conserved cone-to-rod pathway in teleost visual development

Frontiers Bioluminescence of the Largest Luminous Vertebrate, the Kitefin Shark, Dalatias licha: First Insights and Comparative Aspects

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

University of Idaho Research Hits Science Magazine

Vision using multiple distinct rod opsins in deep-sea fishes

How Fish May See Color in the Deep Ocean's Darkness - The New York Times

Adaptation from shallow to deep water environments. (A) Adaptation in

Hyperspectral Vision in Sea Depth - F4News