More than 35 years later, Bdellovibrio biology is undergoing a revival owing to the original, pioneering genetics work of Thomashow and colleagues (13), which has been followed up by genome sequencing and the development of new gene inactivation methods to study the function of these bacteria (32, 42, 60).
They also have five pairs of eyes. The Freshwater Leech is a parasite that feeds on the blood of fish, frogs, turtles, and mammals. It should not be confused with other leeches, most of which prey only on insects, snails, and small creatures.
While leeches are confident swimmers, they are not exceedingly fast, typically covering about a foot every few seconds (check out the video at the bottom for an example of a swimming leech). This type of motion is often most well imitated using a slow retrieve and a fly with a weighted head.