This is a translucent flatfish. It's name is the combination of

Types of Flatfish: the Complete Guide

ODFW Finfish Species - Flatfish

This is a translucent flatfish. It's name is the combination of two words, translucent and flatfish. The reasoning behind this isn't obvious at first, but with the help of this picture I

ODFW Finfish Species - Flatfish

European flounder - Wikipedia

Summer Flounder

Translucent fish hi-res stock photography and images - Alamy

Diagram of a typical flatfish blind-side sagittal otolith

The transparent fishes – Machprinciple.com

Summer Flounder