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Fig. 5. Morphological differences between jaws of cichlids. (A) The river-dwelling
cichlid Metriaclima zebra (left) has a jaw structure (right) that is
well-suited for sucking. (B) The Great Lakes cichlid Labeotropheus
fuelleborni (left) has a jaw structure (right) that is well-suited for
biting. Photographs of Labeotropheus fuelleborni and Metriaclima
zebra courtesy of J. Dion and F. Hagblom, respectively. Drawings
reproduced, with permission, from Albertson et al.
(Albertson et al., 2003a).