I visited the Petco in San Rafael and I was shocked when I saw healthy saltwater fish. I spoke to the Jesse a worker at Petco. He informed me he was the person in charge of keeping all the fish tanks. He informed that he quarantines all fish for two weeks before moving them into the display tanks (I want to note that there was no extra charge for quarantine). Jesse informed me he could special order fish for me from liveaquaria and other vendors. I would highly recommend checking out the Petco in San Rafael.