A Tip Earned

I've recently begun to have...difficulties with a woman who serves as the naturalist on the whale watching boat I work on during the week. For some reason, she is allowed to put out her own tip jar when she is on the boat, while we (ie, the two deckhands and the captain) must remove ours from sight. At the end of each trip, when customers choose to put money into the tip jar, they are in fact tipping her alone, rather than the entire crew. Furthermore, it is entirely up to her whether or not she shares the contents of the jar with the rest of us. Most of the time, based on criteria I have yet to understand, she chooses not to share it with the deckhands or the captain. This might not be a problem, except that I know for a fact that most customers assume that they are tipping the entire crew, and not just the naturalist, because that is the way it is on most boats. Traditionally, anything that is put into the tip jar is shared among the entire crew. To that end, whenever I'm handed cash directly (which occurs daily) and complimented/thanked for my efforts, I put it in the tip jar so that it can be shared with my crew mates.
Anyways, to make a long story short, I'm getting quite bloody fed up with this woman keeping the tips that I've earned. And today, I had an epiphany about why exactly this frustrates me so: if it was "just about the money", then I'd probably just keep the cash that was handed to me and be satisfied that I "got mine". But it's not about that. Of course, the money is important to me (after all, I'm working 7 days a week for a reason), but ultimately the tips are a reflection of the quality of service I'm offering. I'm no happier accepting tips that I didn't earn than I am working hard for none. There's pride at stake. If I didn't care about the quality of experience that the customers have, then why would I be working 6 days a week in the hospitality industry?
So anyways, I've pretty much decided that, if things don't improve soon with respect to equal distribution of tips (and by equal, I mean with the rest of the crew as well), then I'll have to leave the company. Without tips, I'm earning just $11 per hour, which is ridiculous when you figure that I'm making at least twice that with all my other jobs, plus the experience and education that I bring to the job.
Rant complete.