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Histology of digestive organs of Atlantic cod larvae at different ages. a, b 1 dph, c, d 4 dph, e, f 25 dph, g–i 39 dph, and j–n 53 dph. Arrow heads point to sphincters between the foregut and midgut or between the midgut and hindgut. Arrows point to bile duct (bd) or pancreatic duct (pd). fg foregut, ga gallbladder, gg gastric gland, hg hindgut, la islets of Langerhans, li liver, mg midgut, pa pancreas, pc pyloric caeca
