The ornamental design for an L-shaped beam with surface texture for use in a fishhabitat, as shown and described.
FIG. 1 is an isometric view of the L-shaped beam with surface texture for use in a fish habitat;
FIG. 2 is a top elevation view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a rear elevation view thereof; and,
FIG. 6 is a right side elevation view thereof, the left side being a mirror image thereof.
The stippling depicts a rough surface over all surfaces. The broken away symbols in the drawings indicate that any portion of the article beyond what is shown forms no part of the claimed design.