Its about
This is evidently not a dab as they always have 1 eye on the edge. My ID of topknot was at 1st tentative as I hadn’t checked the 2 related Scophthalmidae species Zeugopterus regia & Phrynorhombus norvegicus which google shows have different body shapes. It’s quite likely those agreeing the dab havent revisited the post but also may be unsure of the topknot ID of which I’m now ‘as sure as I can be’. I hope it will be reconsidered, as there seems to be no active fish expert currently to correct mistakes