Leeches are annelids and there are fresh water, terrestrial, and marine leeches. Leeches are hermaphrodites and not all leeches feed on blood as commonly known.

    Chainstrap Leech

    This spotted leech scientifically named Phytobdella catenifera of Malaysia is a large terrestrial leech that can grow up to 5cm long. It was named after the striking chain-striped pattern on the creature's back. This leech is rarely seen because it is only attracted to reptiles and is of no threat to humans.

    China Leech

    Striped leech…well, this leech looks gorgeous for its unique stripe pattern. Being suck by a leech is considered by many people a horrible experience because this creature is so hard to remove from the flesh.

    Horse Leech

    This creature is slimy and sticky but…it is of importance to humans. This species is a Medicinal Leech. The most common medicinal leech is the Hirudo medicinalis, the European Medical Leech. Other medicinal leeches include Hirudo orientalis, Hirudo verbena, Hirudo troctina, Hirudinaria manilenesis or Asian Medical Leech and Macrobdella decora or North American Medical Leech.

    Swallowing Leech （Erpobdella octoculata）

    This leech has a very unusual name - "Swallowing Leech". We are all aware that leeches suck but this one doesn't really have jaws, it just swallows its prey whole. It grows about 5 or 6 cm in length and it feeds on midge larvae, worms and snails.

    Sidney Leech

    Sidney Leech is a true leech. True leeches （Euhirudinea） are an infraclass of the Hirudinea

    True leeches are subdivided into two groups; the first group is called proboscisless leeches and the second group is called jawless leeches.

    Giant Americobdella Leech

    This brightly colored leech commonly called the Giant Americobdella Leech is from Chile. It preys on earthworms and swallows them in whole.

    水蛭是環節動物，有淡水水蛭，陸地水蛭和海生水蛭。水蛭是雌雄同體的，但并不是所有水蛭都嗜血。

    鏈帶水蛭

    科學上稱作馬來西亞Phytobdella catenifera的水蛭是一種可以長到5厘米長的大型陸地水蛭。是根據它背部明顯的鏈帶圖案而命名。這種水蛭只被爬行動物吸引，對人類沒有威脅，因此很少見。

    瓷水蛭

    斑紋水蛭，它獨特的斑紋看起來很漂亮。對許多人們來說被這種水蛭吸食是種恐怖的經歷，因為這種水蛭難以從血肉中移除。

    馬狀水蛭

    這種水蛭纖細又粘人，但對人類很重要。這是一種醫學水蛭。最常見的醫學水蛭是藥用水蛭，歐洲的醫學水蛭。其他的包括藥用水蛭東方，藥用水蛭馬鞭草，藥用水蛭Hirudo troctina,水蛭manilenesis或亞洲醫用水蛭，以及Macrobdella decora或北美醫用水蛭。

    吞咽水蛭（Erpobdella octoculata）

    這種水蛭有著不尋常的名字--吞咽水蛭。我們都發現水蛭吸血，但這種水蛭并沒有爪子，它只會全部吞咽。它長度約為5或6厘米，以幼蚊蟲，蠕蟲，蝸牛為生。

    悉尼水蛭

    悉尼水蛭是真的水蛭。真的水蛭是水蛭的一種附綱。分為兩類，第一類稱作沒有鼻子和嘴的水蛭，第二類叫做無爪水蛭。

    巨型Americobdella水蛭

    這種顏色亮麗的水蛭通常叫巨型Americobdella水蛭，來自智利。它捕獲蚯蚓，而且全吞噬。