Lepeophtheirus pectoralis copepodid stage, during which the copepod attaches itself to the fish. Stages IV, V, VI and VII are the chalimus stages, and are followed by the pre-adult and adult stages, when differentiation of males and females is possible. Lepeophtheirus pectoralis Lepeophtheirus pectoralis is a species of parasitic copepod. It is a parasite of flatfish, the most frequent hosts being the European flounder ("Platichthys flesus"), the plaice ("Pleuronectes platessa"), and the dab ("Limanda limanda"). It feeds on the mucus, skin and blood of the fish, with oviferous females being found in the pectoral and pelvic fins of the host, while immature
RV Platessa RV "Platessa" was handed back to the Ministry of Defence (United Kingdom) after 20 years in service, she was replaced by the "RV Corella". In 1968 the RV "Platessa" was sold to private owners (H.J. Lamprell Ltd) and after sinking in Hamilton Dock, Lowestoft in 1975 she was eventually hulked at Lake Lothing where her remains lay for many years. She was recorded as still extant in Lake Lothing on August 19th 2015, and from examination of Google Earth images it seems that she continues to exist as one of two wooden wrecks (the other being the MFV Yellowtail) in