Underwater Propeller

FIG. 1 is a front, left side perspective view of an underwater propeller showing my new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a left side elevational view thereof; FIG. 5 is a right side elevational view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof, FIG. 8 is a front, left side perspective view thereof in a second configuration; FIG. 9 is a front perspective view a thereof in a third configuration; FIG. 10 is a front, right side perspective view thereof in a fourth configuration; FIG. 11 is a rear, right side perspective view thereof in a second configuration; and, FIG. 12 is an enlarged view of portion 12 shown in FIG. 6 . The portions of the article shown in broken line form no part of the claimed design. The additional broken lines in the FIGS. 6 and 12 illustrate the boundaries of the enlarged view indicators and form no part of the claimed design.