Figure 3: Microsections of ballan wrasse Labrus bergylta larvae during stage 1(7 DAH). (A) Gill arches. (B) Heart. (C) Digestive system. (D) Swim bladder and midgut. A–atrium; BA–bulbus arteriosus; BB–brush border; BV–blood vessel; CT–connective tissue; EC–epithelial cells; FG–foregut; Ca - cartilage; L–liver; MC–mucous cells; MG–midgut; Oe–oesophagus; PL–primary lamellae; PD–pneumatic duct; Si–sinusoid; V–ventricle. Bars: A–D=50 μm. Staining: A, C, D=TB; B=AB-PAS.