Aqua Garden: My Favorite Mechanism

About Aqua Garden, from BoardGameGeek:

In Aqua Garden, you're the owner of an aquarium and want to stock its six tanks with a variety of sea life, but you have a limited amount of funds and only one employee on hand to place the fish in the tanks. Do your best to outshine the other aquariums in town! During a round, the player farthest back on the perimeter of the shared board takes the next turn, moving as many spaces as they want to an empty space and taking the action of that space. If you stop on an advertising space, you receive funds based on what's currently in your tanks. If you stop on a sea creature space, you take them all, move your single employee 1-3 spaces clockwise on your aquarium board, then place the creatures in one or both tanks adjacent to the employee. Each tank has only 4 units of oxygen available, so you can't add creatures to a tank that would consume more oxygen than this. You can add one seaweed to each tank to add oxygen. You must also observe other placement restrictions, such as keeping sharks separate and you can pay to purchase creatures, seaweed, and coral from the sea board. If you've circled the board, you wait for other players to finish, then start a new round, with players moving out in the order that they arrived. After the game ends, players score points for the milestones achieved, funds remaining, order in which they finished, and the sets of creatures they've collected in each tank.