1. There are more than 600 known types of leeches.
2. The largest leech found 19 inches.
3. About one fifth of leeches live in the sea, where they eat fish.
4. Leach has 32 brain.
5. Leach Hirudo puts his babies in a cocoon; while the Amazon leech carries its babies to the stomach - sometimes as many as 300.
6. Not all leeches are bloodsuckers. Many of them are predators that eat earthworms, etc.,
7. Amazon leech uses a different way of sucking blood. He inserts the long proboscis into a sacrifice, and does not bite.
8. The bite of a leech is painless, because of its own anesthesia.
9. Leech Hirudo injects into the skin the prey of the coagulant to prevent blood clotting.
10. Leech will pinch itself until it is full, and then just fall.
11. Leech will strengthen to five times the body weight.
12. The first leech was used in medicine around 1000 B.C., probably in ancient India.
13. In the past, people stood in lakes and pools dotted all over the country, and when leeches were attached to their feet, they put them in baskets and sold them. Today the leech of Hirudo is an endangered species.
14. Initial surgeons were hairdressers, and they used leeches to cure anything from headaches to gout!
15. The nervous system of the leech is very similar to the human nervous system and is a huge benefit for researchers in their search for answers to human problems.
16. The closest relatives of leeches are earthworms.
17. Leeches can bite through the hides of Behemoth!