The following people can be paid less than minimum wage:
Seasonal and recreational. The article I read mentioned Ski Lodges and amusement parks, but I assume a marina would fall under that as well.
Employees under 20 years old can be paid less than minimum wage for their first 90 days of employment.
Tipped employees. If employees recieve tips, they can be paid less than minimum, however the wages and tips must add up to minimum wage, or the employer has to make up the difference
. The interesting thing here is what constitutes a "tipped employee" Just by the discussion here, its not necessarily clear for some occupations. Obviously bartender, luggage porter and cabbie are tipped, but its not so clear for a few others.
sources:
https://www.nolo.com/legal-encyclopedia/right-minimum-wage-32961.html
https://www.cheatsheet.com/money-career/10-jobs-pay-less-minimum-wage.html/?a=viewall