Evidence of extensive multispecies macrofouling in Eckström's topknot Zeugopterus regius (Bonnaterre, 1788), Pleuronectiformes, Scophthalmidae.

Diverse and extensive macrofouling of the left-hand (eyed) side has been observed in multiple films and photographs of different specimens of Eckström's topknot Zeugopterus regius. Identified foulers include macroalgae and tunicates. Photographs of unfouled specimens and preserved juveniles have also been inspected. Macrofouling is not universal in this species; unfouled fish were observed around the strongly tidal British Isles, whereas the worst-fouled topknots were seen in the eutrophic, microtidal northern Adriatic.