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Figure 9


Fig. 9. Schematic drawings (not to scale) that illustrate the fluid jets generated by a caudal fin-wave propagation (CFP) and the pectoral fins in a forward-sinking parrot cichlid executing a CFP. (A) Lateral view, with the CFP, down-stroke and up-stroke jets indicated by green, red and blue arrows, respectively. CM, center of mass of the fish body, indicated by a white and black checked circle; CB, center of buoyancy of the fish body, indicated by a blue filled circle. The straight line connecting the CM and the CB is shown (dashed line). (B) CFP, down-stroke and up-stroke jets observed from behind the fish. The colored numbers adjacent to the jets denote the temporal order of formation of the jets in A and B; only the expelled CFP jets are displayed.





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