AI-generated tattoo project concept: a koi fish in black and grey, rendered for a cover-up and designed with Japanese-inspired elegance. The central koi surges through curling waves, its body adorned with precise scalework and flowing fins, all brought to life by dense line work, cross-hatching, and soft gradient shading. Surrounding water swirls form a decorative frame, with foamy crests and ornamental spirals that give the composition a pattern-rich rhythm. The high-contrast black areas anchor the piece, while lighter greys lend depth and dimension, ensuring readability on skin across placements from forearm to back. This concept intentionally prioritizes a cover-up: broad black blocks can camouflage older ink, and the strategic use of negative space preserves detail in the fins and scales as the tattoo ages. Conceptually, the koi embodies perseverance, transformation, and courage, a timeless meaning enhanced by water imagery that evokes motion and renewal. For practitioners, the design offers flexibility: crisp fine-line detailing in the scales and fins suits fine line tattoo approaches, while the overall silhouette scales gracefully for larger executions. As an AI-generated tattoo project, it demonstrates how digital ideation can translate into a tattoo-ready design with scalable line weights and shading plans, ready to be refined into variations like lotus flower tattoo, infinity tattoo, tribal tattoo, or rose tattoo design within a custom tattoo design framework. This piece also serves as a solid example of Japanese style tattoo in black and grey, a versatile body art option for those pursuing meaningful tattoos, small tattoos, or bold statement work. In short, the koi design merges tradition with contemporary craft, offering a cover-up-friendly, pattern-driven motif that remains visually striking over time. The technique invites subtle gradations from charcoal to near solid black along the belly and tail, while preserving crisp highlights in the eye and fins.