Age determination in fish fish. Johannes Reibisch, working for the Commission of Scientific Investigation of German Seas at Kiel, attempted to use Hoffbauer’s techniques to age plaice ("Plueronectes platessa") but found it difficult to accurately discern annuli. He decided to study a different structure and in 1899 he published the first procedures using otoliths as an aging structure. A fellow scientist also with the German Commission at Kiel, Friedriche Heincke, also frustrated with difficult scale annuli, further studied other structures to age fish. He discovered annuli in the vertebrae, opercula, and pectoral girdle and published his findings in Heicke 1905. The works of Hoffbauer,
Madonna with the Fish Madonna with the Fish Madonna of the Fish, known also as Madonna with the Fish is a painting by the High Renaissance master Raphael. Mary sits enthroned with the Jesus on her knee. On one side is St. Jerome kneeling by the Lion; he is holding a book. On the other side the archangel Raphael is presenting at the foot of the throne the young Tobias, whom he formerly guided to the River Tigris, and who bears the miraculous fish whose heart, liver and gall were to restore his father's sight, and drive the demons from his bride. Tobias with