Fishdom H2O: Hidden Odyssey is the sequel to Fishdom, but abandons the match-3 gameplay for a very different hidden object experience. Like the original, you get to buy fish and decorate three exotically themed fish tanks, trying to keep your fish happy and your tanks beautiful.
You play as Jennifer, a marine biology student from the Environmental Protection University. It's her last summer as a student and she's determined to get a job at Old Barney's Aquarium, the largest marine conservation center in the world. Old Barney won't hire just anyone though, and will only hire Jennifer if she can pass a trial period. Luckily for Jennifer, her Grandpa Jack is a famous oceanographer, and he's happy to guide her along the way.