yeah, I thought seriously about it. But I have several friends and labmates who work or have worked/interned there. They say it gets old due to underpayment, and chronic under-appreciation of the aquarists. In fact, the aquarists are often at odds with management. It's a shame because that place draws in millions of bucks every year. They should better afford to take care of the folks who are directly responsible for the beauty and health of the exhibits.
After talking with them, I decided I love tank-keeping too much to let myself become jaded over it. I've worked enough low-paying jobs in my life that I know under-appreciation always leads to poor job performance for me. And the most unfortunate side-effect would be that the animals under my care would suffer.
So I've decided to keep it a hobby. Once money and politics corrupt it, there might be no going back for me. A friend once told me to do my first love as a hobby, and pursue my second-greatest love as a career. That way, your true passion remains uncorrupted and never loses its charm. I fully agree with that thinking.
One thing that's funny about public aquariums is that they're on flow-through water. In the case of the Monterey Bay Aquarium, their tanks are basically linked directly to the ocean. The water only gets some minor filtration through a bed of sand, but they want the invert larvae and algae to be intact so that they can colonize the exhibits and make it look more natural. But this also means that they don't have to be as aware of their water parameters as we are when dealing with closed, tank systems. They do test for ammonia and phosphate, but it doesn't have as much bearing as it would for us at home.
In fact, one of my labmates (who's the fella who takes care of the jellyfish exhibit) was AMAZED when I showed him pictures of my setups. He thought what I could do was extremely impressive and too high-maintenance for him to accomplish in his own home. He was also super-excited when I told him I was able to breed ornamental shrimp and have even had some success selling them online. He was like, we always talk about that at work, how it would be
so cool if we could make a little $ at it (

, that's literally what he said). He was totally impressed that I had figured out how to raise, breed, market, package, and sell aquatic critters without the professional ties he has.
So it seems it's just a different world, or aspect of tank-keeping. They're curious and amazed at what we we can do with our closed-water systems. Likewise, hobbyists think what they get to do must be the best job in the world.
sorry for rambling. That was just what I've found out about working at a large public display aquarium.