How did the habitats of *Rhinogobius sudoccidentalis* and *Rhinogobius lithopolychroma* differ?
Answer
One preferred slower water over large cobblestones, the other faster water.
*Rhinogobius sudoccidentalis* was located in slower-flowing water situated over large cobblestones, whereas *Rhinogobius lithopolychroma* was found in shallower streams with faster flow and cobble substrates.

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