A commanding pencil portrait of a grizzly bear walking directly toward the viewer through shallow water, rendered with museum-quality precision on white background using graphite. Capture the bear's massive presence and power through careful attention to anatomy and proportion, showing its muscular shoulders and thick legs. The fur should be meticulously detailed with thousands of individual pencil strokes creating realistic texture, showing the characteristic grizzled appearance with varied tones from deep chocolate browns to silvery highlights. The bear's face should be intensely realistic with small, intelligent eyes, powerful jaw structure, and sensitive nose rendered in fine detail. Show water splashing around its paws with dynamic line work and careful shading to suggest movement and reflection. Include a weathered log and scattered rocks in the foreground with authentic textures. The background should be softly rendered with suggestion of riverbank vegetation, maintaining focus on the magnificent animal. Use sophisticated blending and hatching techniques to achieve photorealistic quality. This imposing piece should command attention and respect, demonstrating the highest level of wildlife artistry suitable for gallery exhibition.