Since each of the scenes displayed in this Paleoaoic Aquarium consists of one species, it is difficult to immediately understand the size of each animal.　So, we compared them in actual proportions. They lived in different ages and in different habitat, so a simple comparison may not have significance.

The lengths of the animals are estimates, and will vary among individuals and also among ages. Even if the value used here is close to the correct length, there is a range in actual size.