(A–F) Zebrafish are found in streams both pristine (A) and shared with people (B, D, E), in ephemeral pools at stream margins (F; a close-up of Figure 1C), and in man-made bodies of water (C). (G–K) Many fish might compete with zebrafish at one or more of its life stages, including E. danricus (G), D. dangila (juvenile; H), Oryzias (I), Aplocheilus panchax (J), and P. shalynius (K). (L–O) Among potential predators are Mastecembalus (L), Channa (M), Xenentodon (top) and Barilius (N), and Notopterus (O). For details see Engeszer et al. (2007b). Scale bars: 5 mm (G–M); 5 cm (N, O). Image credits: D Parichy.