JEB -- Hiroi et al. 208 (20): 3851 Figure IG1

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Fig. 1. Yolk balls prepared from Mozambique tilapia embryos and incubated in freshwater (A) and seawater (B) for 48 h. The yolk sac is completely enclosed by the yolk-sac membrane. The yolk balls slightly swelled in freshwater and shrunk in seawater. Bar, 200 µm.