Though there are more than 20,000 different types of annelids, the main kin...More

The main kinds of myriapods are centipedes and millipedes, pauropods, and s...More

Echinoderms are a group of invertebrate animals that live in the sea. There...More

Mollusks are one of the largest groups of invertebrates, with about 100,000...More

Readers of this set will investigate creatures from the fascinating world o...More