The project is focused on the development of bio-inspired granular hydrogel inks for 3D printing starting from water in oil emulsions as templates. Among the countless organisms there is one that has attracted a lot of attention in the last decade, it is the marine mussel. Mussels secrete specialized proteins containing a high content of the catecholic amino acid 3,4-dihydroxyphenylalaine (DOPA), which provides the characteristic ability to grab onto wet surfaces. Mimicking the mussel byssus mechanism has been the main design criteria for the present work as well as other marine organisms such as sandcastle worms that exploit supramolecular interactions. The formulation is developed starting from the synthesis of the mussel-inspired microgels and assessing the rheological parameters that influence the printability as well as the chemical composition through Raman spectroscopy.