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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.
What are cockroaches? There are 19 species of cockroaches found in Hawaii; 3 of which are commonly associated with humans and are considered pests. The three main species in Hawaii are the American, German and Surinam or burrowing cockroach. The American cockroach is the largest of the common roaches and is reddish-brown in color.