Marine mussels are known to be adhesive in wet environments despite conditions that are not ideal for adhesion. Mytilus Californianus is a model organism and subject of interest for applications of wet adhesion. A modified tyronsine residue; 3,4dihydroxyphenylalanine (Dopa), the adhesive protein found in mussel plaques, was measured using cyclic voltammetry for its electrochemical properties over a course of seven days. The oxidation potential of Dopa decreases with time, then increases slightly at day five, and levels off after day 6. This can be attributed to the antioxidant effect of mfp-6 which is also located at the plaque/substrate interface. For optimal adhesion, surfaces are required to be containment and moisture free. To understand how mussels prepare surfaces, a mechanical testing device was employed to calculate the maximum adhesion forces of plaques on different substrates. Mechanical testing of 24-hour plaques on bound gold, glass, and biofilm slides initially show that mussels have greater adhesion with the "unclean" biofilm substrate than any other substrate. However, sufficient data has not been collected to confirm any conclusions. Further investigation will confirm redox potentials of dopa over longer periods of time at different scan rates.