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Figure 1


Fig. 1. Distribution of serotonergic immunoreactive cells (darkly stained cells) along the filament (F) and lamellae (L) in (A) O. mykiss, (B) C. auratus, (C) H. lacerdae, and (D) H. malabaricus. Scale bars, (A) 200 µm, (B–D) 100 µm. Images were colour-inverted to emphasize bright immunofluorescent structures.