Neolamprologus leleupi: Neolamprologus leleupi, also known as Lemon Cichlid, is a species of cichlid endemic to Lake Tanganyika where it occurs throughout the lake. It is a recess-dweller, inhabiting cracks and crevices.Fish gill: Most fish exchange gases using gills on either side of the pharynx (throat). Gills are tissues which consist of cloth and fabric structures called filaments.Aquaculture of sea sponges: Sea sponge aquaculture is the process of farming sea sponges under controlled conditions. It has been conducted in the world's oceans for centuries using a number of aquaculture techniques.European Community Reference Laboratory for Fish Diseases: The European Community Reference Laboratory for Fish DiseasesCommunity Reference Laboratory for Fish Diseases is located in Frederiksberg in Denmark at the National Veterinary Institute (a part of Technical University of Denmark).Baltic sculpin: The Baltic sculpinBaltic sculpin (Cottus microstomus) at EOL (Cottus microstomus) is a species of sculpin, a European freshwater fish in the Cottidae family. It is widespread in the Dniester drainage (Black Sea basin), Odra and Vistula drainages (southern Baltic basin), most likely extending further east to Gulf of Finland.