Everyone encounters the problem of having to work off hours, which interferes with family responsibilities. But this is not much different from many other jobs. There is no simple answer to this, but one can be sure that many marine biologists love their work because it involves being in the field and often traveling to very interesting and lovely places. No consistent answer. Depends upon the specific job.
Marine biologists are more or less like most academics.
They are very middle class by and large and have fairly average opinons, generally resembling those of university staff. On the other hand they are generally passionate about conserving the natural environment and tend towards the side of behaviors that avoid exploitatoin of people and natural resources. The workplace is achievement oriented by and large. Academics are to an extent individualists, which makes them a difficult lot to move as a group. Mass persuasion is not likely for such a group.