Also known as sheepshead, the freshwater drum is known for the rumbling and grunting sounds the males make to attract mates. It is a large, round-profiled, silver humpbacked fish.
The freshwater drum is a rounded fish with a small tail and a silvery cast to its scales. Its mouth is located toward bottom of its face. It's the only freshwater fish on which the lateral line, a sense organ used to detect motion in the water, runs right through tail.
Freshwater drum have particularly large otoliths, stonelike objects found in the ear of many animals. The otoliths help the drum to sense when it is oriented vertically in water too cloudy to see clearly. These otoliths, which can be more than one inch in diameter, have been used by humans for currency, jewelry, and good luck charms.
**Cache at your own risk**
Geocaching, hiking, backpacking and other outdoor activities involve risk to both persons and property. There are many variables including, but not limited to, weather, fitness level, terrain features and outdoor experience, that must be considered prior to seeking a Cache. Be prepared for your journey and be sure to check the current weather and conditions before heading outdoors. Always exercise common sense and caution.
**Remember to be good ambassadors to nature. We as geocachers have a responsibility to leave it as we found it, so others may enjoy nature's glory. Always replace the cache the way you found it, so others may enjoy the find.
For more on geocaching in Iowa, visit the Iowa Geocachers Organization home page 
