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Of the 650 species of leech listed, Hirudo medicinalis is one of the most extensively studied. This annelid from the subclass Hirudinea has 2 suckers, one housing the mouth and its 3 jaws. It lives mainly in the stagnant waters of marshes and ponds. When it comes to reproduction, the animal is a hermaphrodite. Inseminated leeches lay their eggs during the spring and summer months, outside the water, with cocoons containing as many as thirty young.
Jumbo and extra large leeches usually run about 4-5 inches long. Large leeches run about 3-4 inches when fully extended. Extra large and large leeches are typically used for Walleye and bass. Our medium leeches, 2-3 inches long offers the average size leech that appeals to both large and small fish. Small leeches are great for panfish and at about 1 inch long they are at perfect size for helping you catch your daily bag limit. Buying leeches by the pound saves you time and money!