Table 1. Questionnaire design.

Q1. Do you think that mussels contribute in some way to human wellbeing and life quality?		□ Yes [go to 1.1.] □ No [go to 2.] □ Do not know [go to 2.]
Q2. [If yes] How many benefits?		□ Many □ Some □ Few □ None
Q3. [If yes] Can you provide examples of benefits that you consider relevant? [Write all benefits indicated]
Q4. From the range of benefits that mussels provide us shown in the panel (Fig. S1) chose three that you consider the most relevant for the wellbeing and life quality of people that live or visit the county (choose only 3 benefits
Benefit	Q5. Order by importance: 1) Somehow important 2) Very important 3) The most important		Q6. In the last 10 years, the benefit is: 1) Worse 2) Identical 3) Better 4) Do not know
Benefit 1
Benefit 2
Benefit 3