Fig. 4.

Representative marine litter items that were recorded with the ROV during the second dive: a a beverage can and a plastic cup; b a derelict bottom-trawl sac and a door lying next to a big rock; c a rope embedded in the seafloor sediment with horse mussel (Modiolus barbatus) attached on them; d a big plastic piece surrounded by maërl beds (Rhodoliths), an essential habitat of the circalittoral zone; e an iron tube embedded in the sediment and two plastic bottles; f a glass bottle; g the arm of the ROV is about to hook the so-called “Treasure of Andromeda”, a pair of binoculars embedded in the sediment and surrounded by Rhodoliths; h a rope with horse mussel (Modiolus barbatus) attached on them, a glass bottle, a fishing longline and a plastic sheet; i a metal tube embedded in the sediment with polychaeta attached on it