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
Comb flounder Comb flounder The comb flounder, "Marleyella bicolorata", is a flatfish of the family Pleuronectidae. It is a demersal fish that lives on saltwater bottoms at depths of between . Its natural habitat is the tropical waters of the western Indian Ocean, from KwaZulu-Natal and Mozambique in Southern Africa, to coastal Tanzania and Kenya in the African Great lakes region, to Somalia in the Horn of Africa, to Karnataka and Maharashtra in India. It can grow up to in length. The comb flounder is a right-eyed flatfish. Its upper (eyed) side is dark brown, marked with vaguely cruciform dark spots and