Jaw or no Jaw
Jawless leeches have a muscular proboscis puncturing organ in a retractable sheath. Those leeches with a jaw use teeth to bite into their host. The jaw has hundreds of tiny very sharp teeth.
It is a misconception that all leeches suck blood from live hosts when 90 percent of leech species feed off of decomposing matter.
Leeches can be found on land, in freshwater as well as salt water. Leeches attach to their host only detaching once they are full. The leech releases an anesthetic to prevent the host from detecting its presence.
If you manage to get a leech stuck on you, there are a few methods to remove the leech. One of the most common meths is to apply salt, flame or soap to the leech. However,while this will get the leech to immediately drop off, it is not recommended as it often causes the leech to vomit and this can increase the risk of infection and decease.
The recommended method of removal is to break the seal by using a fingernail or a blunt object. The other method is to let it fishing feeding, which can take 20 minutes at which point it will just drop off.
Once it falls off, use soap and water to clean the wound. Bleeding can occur for a long time after removal due to the anti clotting agent released by the leech.