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Figure 4 | BMC Developmental Biology

Figure 4

From: First artificial hybrid of the eel species Anguilla australis and Anguilla anguilla

Figure 4

Head development of A. australis. Head structures of A. australis: a) 5 dpf larva; b) 6.5 dpf larva; c) 8 dpf larva reared at 25°C (representing a stacking of two illustrations of the same larva). Note the remarkable differences between 5 dpf and 6.5 dpf larvae in the development of the 4th ventricle (IV) (with a decrease in volume) and the protrusion of the mouth (M). Between 6.5 dpf and 8 dpf, the formation of teeth commences, the angle of the head increases, and the eyes become pigmented. (Scale bar = 0.5 mm; ov = otic vesicle with otoliths; ot = otoliths).

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