What distinctive physical feature is noted for the Pacific Spotfin Mojarra (*Eucinostomus dowii*)?

Highly extensible mouth

The Pacific Spotfin Mojarra (*Eucinostomus dowii*) is characterized by several traits, including being generally silvery white and residing primarily in coastal environments of the Mexican Pacific. A key anatomical feature that sets it apart and relates to its feeding habits in shallow areas and estuaries is its highly extensible mouth. This specialized mouth structure allows the fish to probe substrates and suck up small food items efficiently from the environment, contrasting with the general feeding habits of other mojarras.