I find most skin art is pretty accepted in most areas. I am a heavily tattooed person, with some controversial art on my skin as well. All arms for me, but still very much out there. I find most people don't blink twice at you. On my recent trip to Coz, I had one person ask about my tattoos, and that was a staff member at the resort. The dive employees there were pretty tattooed also, Most in other languages, mainly script and stuff from their home countries and cultures.
Where you are planning on getting your ink seems like a spot that will not be visible too much, you will have a wetsuit on most of the time you are with "customers".. And even then it will probably be waist high, as you are in between dives.
The main thing here, is that are you sure you are invested in getting this tattoo. If you have questions about your future with said tattoo, are you sure you really want it. Having a super visible tattoo ( one that is always visible, hands, feet, face, neck, forearms, etc) is a big commitment, and there is no turning back then.
Another point to remember, is that being heavily tattooed, seems to be a North American thing, of the heavily tattooed people I have met in my journies, only north americans really are accepting of having a lot of ink, and that would be slanted towards Canadians than americans