|Length:||Size of a leech depends on the species. Some can reach 16 inches in length. Most leeches are usually 0.3 to 3 inches length.|
Leeches belong to the phylum Annelida, which means they are closely related to the common earthworm. Their bodies are segmented into different parts, which can be summarized into head, mid‐body and tail. They have two suckers located at each end of the body: one to connect to other animals for feeding and the second which is only used for moving and erecting the body.
The bite of a leech is actually not dangerous; sometimes people even attach leeches on their body on purpose for medical treatment.