"In this book, early fluent readers will learn why zebra mussels are considered an invasive species, how they have established themselves in and impacted new ecosystems, and what scientists are doing to combat the problem. Bright, full-color photographs and carefully leveled text will engage young readers as they learn more about zebra mussels and how scientists work to control their population. An infographic aids understanding, and an activity offers readers an opportunity to extend discovery. Children can learn more about zebra mussels using our safe search engine that provides relevant, age-appropriate websites. Zebra Mussels also features reading tips for teachers and parents, a table of contents, a glossary, and an index. Zebra Mussels is part of Jump!'s Invasive Species series"-- Provided by publisher.