This study demonstrates the successful development of a composite hydrogel system incorporating methacrylated porcine gelatin (MPG) microparticles within a methacrylated fish gelatin (MFG) matrix. The composite's unique combination of tunable mechanical properties, thermal stability, and controlled swelling behavior highlights its potential for diverse applications in tissue engineering, drug delivery, and regenerative medicine. By adjusting the size and concentration of MPG microparticles and optimizing the methacrylation degree of the MFG matrix, the hydrogels offer enhanced customization, allowing for precise control over key properties critical for biofabrication. The rheological analysis reveals that the shear-thinning and yield stress properties of these hydrogels make them particularly well-suited for extrusionbased 3D printing, while the photo-crosslinkable nature of MFG enables effective utilization in DLP printing. Although larger microparticles did not yield the anticipated reinforcement, findings suggest that particle size and morphology are crucial for network integrity, as irregular or oversized particles may act as structural defects. This study provides a foundation for further optimization of composite hydrogel formulations, positioning them as promising materials for advanced 3D printing applications in biomedical fields.