RV Corella Fisheries Laboratory cooperated with the Admiralty Research Laboratory to identify fish detected by long-range sonar equipment installed at the Admiralty Experimental Station, Perranporth. The RV "Corella" was directed from the shore to an area some 65 km distant, that was returning a strong and extended echo. The "Corella" was able to correlate this target with shoals detected on a conventional echo sounder, and substantial catches of sprats were taken in the area using a midwater trawl. The RV "Corella" was used throughout the 1970s for pioneering studies on fish migration. Individual plaice ("Pleuronectes platessa") fitted with 300 kHz acoustic transponding
Peppered flounder Peppered flounder The peppered flounder ("Paralichthodes algoensis") is a flatfish of the Paralichthodidae family and the only species of the genus "Paralichthodes". It is a demersal fish that lives on sandy and muddy bottoms in subtropical waters, at depths of up to . Its native habitat is the southeastern Atlantic and the western Indian Ocean, specifically the African coastline from Mossel Bay, South Africa, to Delagoa Bay, Mozambique. It grows up to in length. The peppered flounder is a right-eyed flounder with an elongated, oval body. Its upper surface is brownish grey with small dark spots and its underside is