Francis decides to bring his lady friend to work and make her a tank full of live coral. Meanwhile, a huge client has commissioned the team with an incredible project at Grand Cayman. The tension mounts for Francis when Mat forbids him to spend his professional time to work on the tank for Lauren and sends him to Grand Cayman to oversee the project. Things only get harder when the team misses items whose absence will prevent them from completing the biggest project ever. Will they make it?

Jose goes to meet with a client who wants a temporary aquarium built and installed in only two weeks. He is confronted with a difficult decision: should he give in to their requests, which might cost him his job, or install the temporary tank for the famous client who might bring his team favorable publicity? Meanwhile, Ben and Francis visit Orlando, Fla., to perform a total reef makeover. If anything goes wrong with this tight deadline, this house of cards is going to come tumbling down.

Orthodontist Dr. Kawa has a simple request for the new addition to his waiting room aquarium: something "that no one has ever seen before." Jose and the guys have an idea, and it involves a "mermaid's purse." Using shark eggs that are rarely seen in fish tanks, Jose performs a surgical procedure of his own to create something truly unique. Then, the team is hired by one of the largest pet fish suppliers in South Florida to build a tank perfect for underwater gardening, or "aquascaping."