Turn the crank to see: 

• Colorful fish swimming around the tank in a large oval! 
• A delightful crab jumping up and down. The crab looks to be lurching as it pivots to follow a passerby fish. 
• A surprise tiny sea creature (TBD) that spins whenever a fish swims by. 

Inside the fish tank you will also find amazing marine details such as: 

• Underwater green plants 
• Vibrant pink coral 
• Brick-built background including sand and rocky mounds 
• A humble clam 
• And an old helmet

About the design:

The aquarium rests on a stately cabinet that has elaborate details all around with an ornate topper. The cabinet doors open for easy access to the internal mechanisms and the accessories stored within: fish food and chemical containers. The aquarium tank, back drop, and topper are designed to be easily separated by using tiles and reduced stud plates. This provides even better access to the internal mechanism and makes it easy to replace the background, inside features, and/or creatures. The mechanism is very robust and smooth. It involves a combination of gears, links, and a cam. My hope is to include at least 2 backgrounds and possibly 2 complete themes in the box.